diff --git a/discord_rss_bot/custom_message.py b/discord_rss_bot/custom_message.py
index e5f1b14..4a5c819 100644
--- a/discord_rss_bot/custom_message.py
+++ b/discord_rss_bot/custom_message.py
@@ -38,6 +38,7 @@ class CustomEmbed:
     thumbnail_url: str = ""
     footer_text: str = ""
     footer_icon_url: str = ""
+    show_steam_game_icon_in_thumbnail: bool = False
 
 
 def try_to_replace(custom_message: str, template: str, replace_with: str) -> str:
@@ -398,7 +399,7 @@ def save_embed(reader: Reader, feed: Feed, embed: CustomEmbed) -> None:
         feed: The feed to set the tag in.
         embed: The embed to set.
     """
-    embed_dict: dict[str, str | int] = {
+    embed_dict: dict[str, str | int | bool] = {
         "title": embed.title,
         "description": embed.description,
         "color": embed.color,
@@ -409,6 +410,7 @@ def save_embed(reader: Reader, feed: Feed, embed: CustomEmbed) -> None:
         "thumbnail_url": embed.thumbnail_url,
         "footer_text": embed.footer_text,
         "footer_icon_url": embed.footer_icon_url,
+        "show_steam_game_icon_in_thumbnail": embed.show_steam_game_icon_in_thumbnail,
     }
     reader.set_tag(feed, "embed", json.dumps(embed_dict))  # pyright: ignore[reportArgumentType]
 
@@ -428,7 +430,7 @@ def get_embed(reader: Reader, feed: Feed) -> CustomEmbed:
     if embed:
         if not isinstance(embed, str):
             return get_embed_data(embed)  # pyright: ignore[reportArgumentType]
-        embed_data: dict[str, str | int] = json.loads(embed)
+        embed_data: dict[str, str | int | bool] = json.loads(embed)
         return get_embed_data(embed_data)
 
     return CustomEmbed(
@@ -442,10 +444,22 @@ def get_embed(reader: Reader, feed: Feed) -> CustomEmbed:
         thumbnail_url="",
         footer_text="",
         footer_icon_url="",
+        show_steam_game_icon_in_thumbnail=False,
     )
 
 
-def get_embed_data(embed_data: dict[str, str | int]) -> CustomEmbed:
+def coerce_embed_bool(value: object) -> bool:
+    """Normalize stored embed booleans from JSON or form-like values."""
+    if isinstance(value, bool):
+        return value
+    if isinstance(value, int):
+        return value != 0
+    if isinstance(value, str):
+        return value.strip().lower() in {"1", "true", "on", "yes"}
+    return False
+
+
+def get_embed_data(embed_data: dict[str, str | int | bool]) -> CustomEmbed:
     """Get embed data from embed_data.
 
     Args:
@@ -464,6 +478,9 @@ def get_embed_data(embed_data: dict[str, str | int]) -> CustomEmbed:
     thumbnail_url: str = str(embed_data.get("thumbnail_url", ""))
     footer_text: str = str(embed_data.get("footer_text", ""))
     footer_icon_url: str = str(embed_data.get("footer_icon_url", ""))
+    show_steam_game_icon_in_thumbnail: bool = coerce_embed_bool(
+        embed_data.get("show_steam_game_icon_in_thumbnail", False),
+    )
 
     return CustomEmbed(
         title=title,
@@ -476,4 +493,5 @@ def get_embed_data(embed_data: dict[str, str | int]) -> CustomEmbed:
         thumbnail_url=thumbnail_url,
         footer_text=footer_text,
         footer_icon_url=footer_icon_url,
+        show_steam_game_icon_in_thumbnail=show_steam_game_icon_in_thumbnail,
     )
diff --git a/discord_rss_bot/feeds.py b/discord_rss_bot/feeds.py
index ffdbfb3..a75629e 100644
--- a/discord_rss_bot/feeds.py
+++ b/discord_rss_bot/feeds.py
@@ -12,6 +12,7 @@ import re
 import time
 from collections.abc import Callable
 from contextlib import suppress
+from pathlib import Path
 from typing import TYPE_CHECKING
 from typing import Any
 from typing import Literal
@@ -186,6 +187,123 @@ def extract_domain(url: str) -> str:  # noqa: PLR0911
         return "Other"
 
 
+STEAM_STORE_APP_ID_PATH_PREFIXES: tuple[tuple[str, ...], ...] = (
+    ("feeds", "news", "app"),
+    ("news", "app"),
+    ("app",),
+)
+
+
+def is_steam_feed_url(url: str) -> bool:
+    """Return whether a feed URL belongs to Steam."""
+    if not url:
+        return False
+
+    try:
+        parsed_url: ParseResult = urlparse(url)
+    except ValueError:
+        return False
+
+    normalized_netloc: str = parsed_url.netloc.lower().removeprefix("www.")
+    return normalized_netloc in frozenset({"store.steampowered.com", "steamcommunity.com"})
+
+
+def _extract_steam_app_id_from_path(normalized_netloc: str, path_segments: list[str]) -> str | None:
+    if normalized_netloc == "store.steampowered.com":
+        for prefix in STEAM_STORE_APP_ID_PATH_PREFIXES:
+            prefix_length: int = len(prefix)
+            if len(path_segments) > prefix_length and tuple(path_segments[:prefix_length]) == prefix:
+                app_id: str = path_segments[prefix_length]
+                if app_id.isdigit():
+                    return app_id
+
+    if normalized_netloc == "steamcommunity.com" and len(path_segments) > 1:
+        app_type: str = path_segments[0]
+        app_id = path_segments[1]
+        if app_type in frozenset({"games", "app"}) and app_id.isdigit():
+            return app_id
+
+    return None
+
+
+def _extract_steam_app_id_from_query(parsed_url: ParseResult) -> str | None:
+    query_params: dict[str, list[str]] = parse_qs(parsed_url.query)
+    for key in ("appid", "app_id", "appids"):
+        for value in query_params.get(key, []):
+            cleaned_value: str = value.strip()
+            if cleaned_value.isdigit():
+                return cleaned_value
+    return None
+
+
+def extract_steam_app_id_from_url(url: str) -> str | None:
+    """Extract a Steam application ID from a Steam URL when present.
+
+    Args:
+        url: The Steam URL to inspect.
+
+    Returns:
+        str | None: The application ID when present in the path or query string, otherwise None.
+    """
+    if not url:
+        return None
+
+    try:
+        parsed_url: ParseResult = urlparse(url)
+    except ValueError:
+        return None
+
+    normalized_netloc: str = parsed_url.netloc.lower().removeprefix("www.")
+    path_segments: list[str] = [segment for segment in parsed_url.path.split("/") if segment]
+    return _extract_steam_app_id_from_path(normalized_netloc, path_segments) or _extract_steam_app_id_from_query(
+        parsed_url
+    )
+
+
+def get_local_steam_game_icon_file(app_id: str) -> WebhookFile | None:
+    """Return a local Steam game icon file for Discord upload when available."""
+    icon_path: Path = Path(__file__).resolve().parent.parent / "icons" / f"{app_id}.png"
+    if not icon_path.is_file():
+        return None
+
+    try:
+        icon_bytes: bytes = icon_path.read_bytes()
+    except OSError:
+        logger.exception("Failed to read local Steam icon for app %s from %s", app_id, icon_path)
+        return None
+
+    if not icon_bytes:
+        logger.warning("Local Steam icon file is empty for app %s: %s", app_id, icon_path)
+        return None
+
+    content_hash: str = hashlib.sha256(icon_bytes).hexdigest()[:12]
+    return WebhookFile(
+        filename=f"steam-app-{app_id}-{content_hash}.png",
+        content=icon_bytes,
+    )
+
+
+def get_steam_game_thumbnail(entry: Entry) -> tuple[str | None, WebhookFile | None]:
+    """Return the preferred Steam thumbnail source for an entry.
+
+    Returns:
+        tuple[str | None, WebhookFile | None]: Thumbnail URL and optional uploaded file.
+    """
+    feed_url: str = str(getattr(entry.feed, "url", "") or "")
+    if not is_steam_feed_url(feed_url):
+        return None, None
+
+    app_id: str | None = extract_steam_app_id_from_url(feed_url) or extract_steam_app_id_from_url(str(entry.link or ""))
+    if not app_id:
+        return None, None
+
+    local_icon_file: WebhookFile | None = get_local_steam_game_icon_file(app_id)
+    if local_icon_file:
+        return f"attachment://{local_icon_file.filename}", local_icon_file
+
+    return f"https://cdn.cloudflare.steamstatic.com/steam/apps/{app_id}/capsule_sm_120.jpg", None
+
+
 def send_entry_to_discord(entry: Entry, reader: Reader) -> str | None:
     """Send a single entry to Discord.
 
@@ -1719,6 +1837,10 @@ def create_embed_webhook(  # noqa: C901, PLR0912
     custom_embed: CustomEmbed = replace_tags_in_embed(feed=feed, entry=entry, reader=reader)
     media_gallery_image_limit: int = get_feed_media_gallery_image_limit(reader, feed)
     webhook_text_length_limit: int = get_feed_webhook_text_length_limit(reader, feed)
+    steam_game_thumbnail_url: str | None = None
+    steam_game_thumbnail_file: WebhookFile | None = None
+    if custom_embed.show_steam_game_icon_in_thumbnail:
+        steam_game_thumbnail_url, steam_game_thumbnail_file = get_steam_game_thumbnail(entry)
     if media_gallery_image_limit == 0:
         custom_embed.image_url = ""
         custom_embed.thumbnail_url = ""
@@ -1771,8 +1893,9 @@ def create_embed_webhook(  # noqa: C901, PLR0912
             icon_url=custom_embed.author_icon_url,
         )
 
-    if custom_embed.thumbnail_url:
-        discord_embed.set_thumbnail(url=custom_embed.thumbnail_url)
+    embed_thumbnail_url: str = steam_game_thumbnail_url or custom_embed.thumbnail_url
+    if embed_thumbnail_url:
+        discord_embed.set_thumbnail(url=embed_thumbnail_url)
 
     if custom_embed.image_url:
         discord_embed.set_image(url=custom_embed.image_url)
@@ -1786,6 +1909,9 @@ def create_embed_webhook(  # noqa: C901, PLR0912
     if custom_embed.footer_icon_url and not custom_embed.footer_text:
         discord_embed.set_footer(text="-", icon_url=custom_embed.footer_icon_url)
 
+    if steam_game_thumbnail_file:
+        webhook.add_file(file=steam_game_thumbnail_file.content, filename=steam_game_thumbnail_file.filename)
+
     webhook.add_embed(discord_embed)
     return webhook
 
diff --git a/discord_rss_bot/main.py b/discord_rss_bot/main.py
index 746cd3e..acc07d9 100644
--- a/discord_rss_bot/main.py
+++ b/discord_rss_bot/main.py
@@ -63,6 +63,7 @@ from discord_rss_bot.feeds import get_feed_media_gallery_image_limit
 from discord_rss_bot.feeds import get_feed_webhook_text_length_limit
 from discord_rss_bot.feeds import get_screenshot_layout
 from discord_rss_bot.feeds import get_sent_webhook_records
+from discord_rss_bot.feeds import is_steam_feed_url
 from discord_rss_bot.feeds import send_entry_to_discord
 from discord_rss_bot.feeds import send_to_discord
 from discord_rss_bot.feeds import update_feed_and_collect_modified_entries
@@ -1221,7 +1222,7 @@ async def get_embed_page(
     # Get previous data, this is used when creating the form.
     embed: CustomEmbed = get_embed(reader, feed)
 
-    context: dict[str, Request | Feed | str | Entry | CustomEmbed] = {
+    context: dict[str, Request | Feed | str | Entry | CustomEmbed | bool] = {
         "request": request,
         "feed": feed,
         "title": embed.title,
@@ -1234,6 +1235,7 @@ async def get_embed_page(
         "author_icon_url": embed.author_icon_url,
         "footer_text": embed.footer_text,
         "footer_icon_url": embed.footer_icon_url,
+        "show_steam_game_icon_in_thumbnail": embed.show_steam_game_icon_in_thumbnail,
     }
     if custom_embed := get_embed(reader, feed):
         context["custom_embed"] = custom_embed
@@ -1258,6 +1260,7 @@ async def post_embed(  # noqa: C901
     author_icon_url: Annotated[str, Form()] = "",
     footer_text: Annotated[str, Form()] = "",
     footer_icon_url: Annotated[str, Form()] = "",
+    show_steam_game_icon_in_thumbnail: Annotated[bool, Form()] = False,
 ) -> RedirectResponse:
     """Set the embed settings.
 
@@ -1273,6 +1276,7 @@ async def post_embed(  # noqa: C901
         author_icon_url: The author icon url of the embed.
         footer_text: The footer text of the embed.
         footer_icon_url: The footer icon url of the embed.
+        show_steam_game_icon_in_thumbnail: Whether to use the Steam game icon as the embed thumbnail.
         reader: The Reader instance.
 
     Returns:
@@ -1303,6 +1307,8 @@ async def post_embed(  # noqa: C901
         custom_embed.footer_text = footer_text
     if footer_icon_url != custom_embed.footer_icon_url:
         custom_embed.footer_icon_url = footer_icon_url
+    if show_steam_game_icon_in_thumbnail != custom_embed.show_steam_game_icon_in_thumbnail:
+        custom_embed.show_steam_game_icon_in_thumbnail = show_steam_game_icon_in_thumbnail
 
     # Save the data.
     save_embed(reader, feed, custom_embed)
@@ -1855,6 +1861,7 @@ async def get_feed(  # noqa: C901, PLR0912, PLR0914, PLR0915
                 "webhook_text_length_limit": get_feed_webhook_text_length_limit(reader, feed),
                 "max_webhook_text_length_limit": 4000,
                 "save_sent_webhooks": feed_saves_sent_webhooks(reader, feed),
+                "is_steam_feed": is_steam_feed_url(feed.url),
             }
             return templates.TemplateResponse(request=request, name="feed.html", context=context)
 
@@ -1921,6 +1928,7 @@ async def get_feed(  # noqa: C901, PLR0912, PLR0914, PLR0915
         "webhook_text_length_limit": get_feed_webhook_text_length_limit(reader, feed),
         "max_webhook_text_length_limit": 4000,
         "save_sent_webhooks": feed_saves_sent_webhooks(reader, feed),
+        "is_steam_feed": is_steam_feed_url(feed.url),
     }
     return templates.TemplateResponse(request=request, name="feed.html", context=context)
 
diff --git a/discord_rss_bot/templates/embed.html b/discord_rss_bot/templates/embed.html
index 4bcc3a7..c2f4595 100644
--- a/discord_rss_bot/templates/embed.html
+++ b/discord_rss_bot/templates/embed.html
@@ -245,6 +245,17 @@
                 <label for="thumbnail_url" class="col-sm-6 col-form-label">Thumbnail</label>
                 <input name="thumbnail_url" type="text" class="form-control bg-dark border-dark text-muted"
                     id="thumbnail_url" {% if thumbnail_url %} value="{{- thumbnail_url -}}" {% endif %} />
+                <div class="form-check mt-2">
+                    <input
+                        class="form-check-input"
+                        type="checkbox"
+                        id="show_steam_game_icon_in_thumbnail"
+                        name="show_steam_game_icon_in_thumbnail"
+                        value="true"
+                        {% if show_steam_game_icon_in_thumbnail %}checked{% endif %}
+                    />
+                    <label class="form-check-label" for="show_steam_game_icon_in_thumbnail"> Use Steam game icon as thumbnail when available </label>
+                </div>
                 <label for="footer_text" class="col-sm-6 col-form-label">Footer text</label>
                 <input name="footer_text" type="text" class="form-control bg-dark border-dark text-muted"
                     id="footer_text" {% if footer_text %} value="{{- footer_text -}}" {% endif %} />
diff --git a/discord_rss_bot/templates/feed.html b/discord_rss_bot/templates/feed.html
index 76c8434..dcefd1a 100644
--- a/discord_rss_bot/templates/feed.html
+++ b/discord_rss_bot/templates/feed.html
@@ -338,6 +338,9 @@
                                 </a>
                             {% endif %}
                         </div>
+                        {% if is_steam_feed %}
+                            <div class="form-text mt-2">Steam feeds can enable thumbnails in embed settings.</div>
+                        {% endif %}
                     </section>
                     <section class="mt-4 pt-3 border-top border-secondary-subtle">
                         <h3 class="h6 text-uppercase text-muted mb-3">Feed URL</h3>
diff --git a/icons/570.png b/icons/570.png
new file mode 100644
index 0000000..e97fc97
Binary files /dev/null and b/icons/570.png differ
diff --git a/tests/test_custom_message.py b/tests/test_custom_message.py
index 38cf649..ecd744a 100644
--- a/tests/test_custom_message.py
+++ b/tests/test_custom_message.py
@@ -355,6 +355,7 @@ def test_save_embed_serializes_embed_and_writes_feed_tag() -> None:
         thumbnail_url="https://example.com/thumb.png",
         footer_text="Footer",
         footer_icon_url="https://example.com/footer.png",
+        show_steam_game_icon_in_thumbnail=True,
     )
 
     save_embed(reader=reader, feed=feed, embed=embed)
@@ -365,6 +366,7 @@ def test_save_embed_serializes_embed_and_writes_feed_tag() -> None:
     parsed = typing.cast("dict[str, str]", __import__("json").loads(call_args[2]))
     assert parsed["title"] == "Title"
     assert parsed["footer_icon_url"] == "https://example.com/footer.png"
+    assert parsed["show_steam_game_icon_in_thumbnail"] is True
 
 
 def test_get_embed_returns_default_embed_when_tag_is_empty() -> None:
@@ -420,8 +422,10 @@ def test_get_embed_data_coerces_values_to_strings() -> None:
             "thumbnail_url": 8,
             "footer_text": 9,
             "footer_icon_url": 10,
+            "show_steam_game_icon_in_thumbnail": "true",
         },
     )
 
     assert embed.title == "1"
     assert embed.footer_icon_url == "10"
+    assert embed.show_steam_game_icon_in_thumbnail is True
diff --git a/tests/test_feeds.py b/tests/test_feeds.py
index 793fcbf..f5e87b9 100644
--- a/tests/test_feeds.py
+++ b/tests/test_feeds.py
@@ -379,6 +379,21 @@ def test_get_feed_media_gallery_image_limit_defaults_to_first_image() -> None:
     assert result == 1
 
 
+@pytest.mark.parametrize(
+    ("url", "expected_app_id"),
+    [
+        ("https://store.steampowered.com/feeds/news/app/570/?cc=us&l=english", "570"),
+        ("https://store.steampowered.com/news/app/440/view/1234567890", "440"),
+        ("https://store.steampowered.com/app/730/CounterStrike_2/", "730"),
+        ("https://steamcommunity.com/games/570/rss/", "570"),
+        ("https://steamcommunity.com/app/730/announcements/detail/1234567890", "730"),
+        ("https://example.com/feed.xml", None),
+    ],
+)
+def test_extract_steam_app_id_from_url(url: str, expected_app_id: str | None) -> None:
+    assert feeds.extract_steam_app_id_from_url(url) == expected_app_id
+
+
 @pytest.mark.parametrize(
     ("tag_value", "expected_limit"),
     [
@@ -909,6 +924,122 @@ def test_create_embed_webhook_can_disable_media_images(
     mock_fetch_ttvdrops_campaign_media_items.assert_not_called()
 
 
+@patch("discord_rss_bot.feeds.fetch_ttvdrops_campaign_media_items", return_value=[])
+@patch("discord_rss_bot.feeds.replace_tags_in_embed")
+def test_create_embed_webhook_can_use_steam_game_icon_thumbnail(
+    mock_replace_tags_in_embed: MagicMock,
+    mock_fetch_ttvdrops_campaign_media_items: MagicMock,
+) -> None:
+    reader = MagicMock()
+    reader.get_tag.side_effect = lambda resource, key, default=None: {  # noqa: ARG005
+        "media_gallery_image_limit": 0,
+        "webhook_text_length_limit": 4000,
+    }.get(key, default)
+    entry = MagicMock()
+    entry.id = "entry-steam-1"
+    entry.title = "Dota 2 patch notes"
+    entry.link = "https://steamcommunity.com/games/570/announcements/detail/1234567890"
+    entry.summary = ""
+    entry.content = []
+    entry.feed.url = "https://store.steampowered.com/feeds/news/app/570/?cc=us&l=english"
+    mock_replace_tags_in_embed.return_value = feeds.CustomEmbed(
+        description="Steam news",
+        thumbnail_url="https://example.com/custom-thumb.jpg",
+        show_steam_game_icon_in_thumbnail=True,
+    )
+
+    with patch("discord_rss_bot.feeds.Path.is_file", return_value=False):
+        webhook = feeds.create_embed_webhook("https://discord.com/api/webhooks/123/abc", entry, reader)
+
+    assert "components" not in webhook.json
+    embeds = webhook.json.get("embeds")
+    assert isinstance(embeds, list)
+    assert isinstance(embeds[0], dict)
+    assert embeds[0]["thumbnail"] == {
+        "url": "https://cdn.cloudflare.steamstatic.com/steam/apps/570/capsule_sm_120.jpg",
+    }
+    assert webhook.files == []
+    mock_fetch_ttvdrops_campaign_media_items.assert_not_called()
+
+
+@patch("discord_rss_bot.feeds.fetch_ttvdrops_campaign_media_items", return_value=[])
+@patch("discord_rss_bot.feeds.replace_tags_in_embed")
+def test_create_embed_webhook_prefers_local_steam_game_icon_thumbnail(
+    mock_replace_tags_in_embed: MagicMock,
+    mock_fetch_ttvdrops_campaign_media_items: MagicMock,
+) -> None:
+    local_icon_bytes = b"local-steam-icon"
+
+    reader = MagicMock()
+    reader.get_tag.side_effect = lambda resource, key, default=None: {  # noqa: ARG005
+        "media_gallery_image_limit": 0,
+        "webhook_text_length_limit": 4000,
+    }.get(key, default)
+    entry = MagicMock()
+    entry.id = "entry-steam-local-1"
+    entry.title = "Dota 2 patch notes"
+    entry.link = "https://steamcommunity.com/games/570/announcements/detail/1234567890"
+    entry.summary = ""
+    entry.content = []
+    entry.feed.url = "https://store.steampowered.com/feeds/news/app/570/?cc=us&l=english"
+    mock_replace_tags_in_embed.return_value = feeds.CustomEmbed(
+        description="Steam news",
+        thumbnail_url="https://example.com/custom-thumb.jpg",
+        show_steam_game_icon_in_thumbnail=True,
+    )
+
+    with (
+        patch("discord_rss_bot.feeds.Path.is_file", return_value=True),
+        patch("discord_rss_bot.feeds.Path.read_bytes", return_value=local_icon_bytes),
+    ):
+        webhook = feeds.create_embed_webhook("https://discord.com/api/webhooks/123/abc", entry, reader)
+
+    embeds = webhook.json.get("embeds")
+    assert isinstance(embeds, list)
+    assert isinstance(embeds[0], dict)
+    assert len(webhook.files) == 1
+    uploaded_icon = webhook.files[0]
+    assert uploaded_icon.content == local_icon_bytes
+    assert uploaded_icon.filename.startswith("steam-app-570-")
+    assert uploaded_icon.filename.endswith(".png")
+    assert embeds[0]["thumbnail"] == {"url": f"attachment://{uploaded_icon.filename}"}
+    mock_fetch_ttvdrops_campaign_media_items.assert_not_called()
+
+
+@patch("discord_rss_bot.feeds.fetch_ttvdrops_campaign_media_items", return_value=[])
+@patch("discord_rss_bot.feeds.replace_tags_in_embed")
+def test_create_embed_webhook_does_not_inject_steam_thumbnail_when_app_id_is_missing(
+    mock_replace_tags_in_embed: MagicMock,
+    mock_fetch_ttvdrops_campaign_media_items: MagicMock,
+) -> None:
+    reader = MagicMock()
+    reader.get_tag.side_effect = lambda resource, key, default=None: {  # noqa: ARG005
+        "media_gallery_image_limit": 0,
+        "webhook_text_length_limit": 4000,
+    }.get(key, default)
+    entry = MagicMock()
+    entry.id = "entry-steam-2"
+    entry.title = "Steam group post"
+    entry.link = "https://steamcommunity.com/groups/example/announcements/detail/1234567890"
+    entry.summary = ""
+    entry.content = []
+    entry.feed.url = "https://steamcommunity.com/groups/example/rss/"
+    mock_replace_tags_in_embed.return_value = feeds.CustomEmbed(
+        description="Steam group news",
+        thumbnail_url="https://example.com/custom-thumb.jpg",
+        show_steam_game_icon_in_thumbnail=True,
+    )
+
+    webhook = feeds.create_embed_webhook("https://discord.com/api/webhooks/123/abc", entry, reader)
+
+    assert "components" not in webhook.json
+    embeds = webhook.json.get("embeds")
+    assert isinstance(embeds, list)
+    assert isinstance(embeds[0], dict)
+    assert "thumbnail" not in embeds[0]
+    mock_fetch_ttvdrops_campaign_media_items.assert_not_called()
+
+
 @patch("discord_rss_bot.feeds.fetch_ttvdrops_campaign_media_items", return_value=[])
 @patch("discord_rss_bot.feeds.replace_tags_in_embed")
 def test_create_embed_webhook_uses_feed_text_length_limit_for_regular_embed_description(
@@ -936,8 +1067,8 @@ def test_create_embed_webhook_uses_feed_text_length_limit_for_regular_embed_desc
     assert isinstance(embeds, list)
     assert isinstance(embeds[0], dict)
     assert isinstance(embeds[0].get("description"), str)
-    assert len(embeds[0]["description"]) == 20
-    assert embeds[0]["description"].endswith("...")
+    assert len(embeds[0]["description"]) == 20  # pyright: ignore[reportArgumentType]
+    assert embeds[0]["description"].endswith("...")  # pyright: ignore[reportOptionalMemberAccess, reportAttributeAccessIssue]
     mock_fetch_ttvdrops_campaign_media_items.assert_not_called()
 
 
diff --git a/tests/test_main.py b/tests/test_main.py
index b378a29..710499d 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -303,6 +303,60 @@ def test_get() -> None:
     assert response.status_code == 200, f"/whitelist failed: {response.text}"
 
 
+def test_feed_page_shows_steam_thumbnail_hint_for_steam_feeds() -> None:
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+        title: str
+        updates_enabled: bool = True
+        last_exception: None = None
+        added: None = None
+        last_updated: None = None
+        last_retrieved: None = None
+        update_after: None = None
+
+    class StubReader:
+        def __init__(self) -> None:
+            self.feed = DummyFeed(
+                url="https://store.steampowered.com/feeds/news/app/570/?cc=US&l=english",
+                title="Dota 2",
+            )
+
+        def get_feed(self, feed_url: str) -> DummyFeed:
+            assert feed_url == self.feed.url
+            return self.feed
+
+        def get_tag(self, _resource: object, key: str, default: TestTagValue = None) -> TestTagValue:
+            return {
+                "webhooks": [],
+                "delivery_mode": "embed",
+                "screenshot_layout": "desktop",
+                "media_gallery_image_limit": 0,
+                "webhook_text_length_limit": 4000,
+                "save_sent_webhooks": True,
+            }.get(key, default)
+
+        def get_entry_counts(self, **_kwargs: TestKwargValue) -> SimpleNamespace:
+            return SimpleNamespace(total=0)
+
+        def get_entries(self, **_kwargs: TestKwargValue) -> list[Entry]:
+            return []
+
+        def get_feed_counts(self, **_kwargs: TestKwargValue) -> SimpleNamespace:
+            return SimpleNamespace()
+
+    stub = StubReader()
+    app.dependency_overrides[get_reader_dependency] = lambda: stub
+
+    try:
+        with patch("discord_rss_bot.main.create_html_for_feed", return_value=""):
+            response: Response = client.get(url="/feed", params={"feed_url": stub.feed.url})
+
+        assert response.status_code == 200, f"/feed failed: {response.text}"
+    finally:
+        app.dependency_overrides = {}
+
+
 def test_blacklist_page_uses_live_preview_layout() -> None:
     ensure_preview_feed_exists()
 
@@ -2562,6 +2616,7 @@ def test_post_embed_saves_all_fields() -> None:
                     "thumbnail_url": "https://example.com/thumb.png",
                     "footer_text": "Footer Text",
                     "footer_icon_url": "https://example.com/footer.png",
+                    "show_steam_game_icon_in_thumbnail": "true",
                 },
                 follow_redirects=False,
             )
@@ -2584,6 +2639,7 @@ def test_post_embed_saves_all_fields() -> None:
         assert saved["thumbnail_url"] == "https://example.com/thumb.png"
         assert saved["footer_text"] == "Footer Text"
         assert saved["footer_icon_url"] == "https://example.com/footer.png"
+        assert saved["show_steam_game_icon_in_thumbnail"] is True
     finally:
         app.dependency_overrides = {}
 
@@ -2603,6 +2659,7 @@ def test_post_embed_allows_clearing_description() -> None:
         "thumbnail_url": "",
         "footer_text": "",
         "footer_icon_url": "",
+        "show_steam_game_icon_in_thumbnail": False,
     })
     stub = _make_stub_reader_for_embed(stored_embed=existing)
     app.dependency_overrides[get_reader_dependency] = lambda: stub
@@ -2660,6 +2717,7 @@ def test_post_embed_allows_clearing_all_fields() -> None:
         "thumbnail_url": "https://old.example.com/thumb.png",
         "footer_text": "Old Footer",
         "footer_icon_url": "https://old.example.com/footer.png",
+        "show_steam_game_icon_in_thumbnail": True,
     })
     stub = _make_stub_reader_for_embed(stored_embed=existing)
     app.dependency_overrides[get_reader_dependency] = lambda: stub
@@ -2699,6 +2757,7 @@ def test_post_embed_allows_clearing_all_fields() -> None:
         assert not saved["thumbnail_url"]
         assert not saved["footer_text"]
         assert not saved["footer_icon_url"]
+        assert saved["show_steam_game_icon_in_thumbnail"] is False
     finally:
         app.dependency_overrides = {}
 
@@ -2716,6 +2775,7 @@ def test_post_embed_untouched_fields_retain_values() -> None:
         "thumbnail_url": "",
         "footer_text": "Old Footer",
         "footer_icon_url": "",
+        "show_steam_game_icon_in_thumbnail": False,
     })
     stub = _make_stub_reader_for_embed(stored_embed=existing)
     app.dependency_overrides[get_reader_dependency] = lambda: stub
@@ -2755,6 +2815,7 @@ def test_post_embed_untouched_fields_retain_values() -> None:
         assert saved["author_name"] == "Author"
         assert saved["author_url"] == "https://a.example.com"
         assert saved["footer_text"] == "Old Footer"
+        assert saved["show_steam_game_icon_in_thumbnail"] is False
     finally:
         app.dependency_overrides = {}
 
@@ -2792,6 +2853,7 @@ def test_post_embed_saves_empty_description_when_no_prior_embed_exists() -> None
         saved: dict[str, str] = json.loads(json_arg)
         assert saved["title"] == "Just a Title"
         assert not saved["description"], f"Expected empty description, got {saved['description']!r}"
+        assert saved["show_steam_game_icon_in_thumbnail"] is False
     finally:
         app.dependency_overrides = {}