HomeBrandsSteamGaminginvalid platform
invalid platform
Moderate
Steam · Gaming
The game is not available on your current operating system
Quick Answer
Error code Invalid Platform on your Steam Gaming means: The game is not available on your current operating system. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
STEAM-DECKSTEAM-LINUXSTEAM-MACSTEAM-WINSTEAM-MOBILE
Likely Causes
  1. You purchased a game that only supports Windows but are on Mac or Linux
  2. The developer removed support for your platform in a recent update
  3. Steam Deck/Proton compatibility layer cannot run this game
  4. The game requires a specific OS version you do not have
How to Fix It
1
Check the game's store page for supported platforms (look for Windows/Mac/Linux icons)
2
On Steam Deck or Linux, check ProtonDB (protondb.com) for compatibility reports
3
If on Steam Deck, try forcing a different Proton version in the game's Properties > Compatibility
4
Consider using dual-boot or a virtual machine to run the game on the required OS
5
Request a refund through Steam if the game was purchased by mistake for the wrong platform
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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