Spacetris

These steps assume you are comfortable using Desktop Mode on your Steam Deck.

1. Switch to Desktop Mode
   On your Steam Deck, press the Steam button → Power → Switch to Desktop.
2. Download the Linux build
   Use a browser in Desktop Mode to download the Linux version of Spacetris to your Deck (e.g. into the Downloads folder).
3. Extract the game
   Right‑click downloaded .zip archive and choose Extract, then place the extracted folder somewhere like /home/deck/Games/Spacetris.
4. Make the executable runnable
   Right‑click the game executableSpacetris.x86_64 and choose → Properties → Permissions → enable Is executable.
5. Add to Steam
   Open the Steam client in Desktop Mode → Add a Game → Add a Non‑Steam Game… → Browse and select the Spacetris executable → Add Selected Programs.
6. Play in Gaming Mode
   Exit back to Gaming Mode. Spacetris will now appear in your Library and can be launched like any other game.

Note: Exact paths and UI labels may change slightly with SteamOS updates, but the overall process remains the same.