Manually Add a Game by App ID
Sometimes Steam or the app's developer removes a game from the Steam store entirely, and even though you still technically own it, it can no longer be found automatically. This feature is also useful for adding content like DLC, soundtracks, videos, and tools from your library that SGI doesn't automatically detect.
Manual Add doesn't verify the App ID against Steam. Double check the ID is correct by using a tool like SteamDB.
Where It's Available
The button appears in the header of these pages:
Each page adds the game to its own list only. For example, adding a game manually in Card Farming doesn't also add it to Favorites or Automatic Idler. Repeat the process on each page where you want it to appear.
Adding a Game
Click the button in the top-right of the page header
Enter a name for the game and its Steam App ID
You can find a game's App ID in its Steam store URL, e.g. store.steampowered.com/app/252950 has an App ID of 252950. If the game is no longer available on the Steam store, you can use a tool like SteamDB
Click Add to add it to the list
Once a game has been added, you can right-click it to bring up a menu where you can idle it, view its achievements, and easily add it to other lists
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