EA FC 25

On Linux, Steam Deck and Steam Machine

Its anti-cheat (EA anticheat) does not permit Linux, so multiplayer won't work regardless of Proton tier.

Valve rates it Unsupported on Steam Machine. Valve marks it Unsupported on SteamOS.

Proton tier: ProtonDB · Anti-cheat: AreWeAntiCheatYet · Deck rating: Valve · Steam Machine, Steam Frame and SteamOS ratings: Valve · Compare 2,053 games · Every game Valve rated for Steam Machine