Surprisingly, Rockstar have now added BattlEye anti-cheat to Grand Theft Auto V, and sadly it seems they have not enabled the support for Linux desktop and Steam Deck with Valve's Proton.

GTA Online was recently updated with new anti-cheat software, and some players think this move could be a sign that GTA 5's PC port may be in for a serious upgrade. If you're a little confused regarding the connection between GTA Online's new BattleEye anti-cheat software and GTA 5's graphics on PC,

Recently, we had the news that Rockstar updated Grand Theft Auto V to include BattlEye anti-cheat, and they have not enabled the Linux / Proton support that BattlEye offers. With that change, the online mode is now broken for Linux / Steam Deck.

Rockstar claims the Steam Deck doesn’t support BattlEye anti-cheat — but that’s not exactly true.

Thanks to a recent update, Grand Theft Auto 5 and Grand Theft Auto Online can't be played on the Steam Deck.The Latest Tech News, Delivered to Your Inbox

The addition of BattlEye anti-cheat to GTA has made the game incompatible with the Steam Deck. Steam Deck players can no longer access the GTA Online portion of the game. Rockstar is blaming Valve, despite other BattlEye games being compatible with the platform.

Grand Theft Auto V ( GTA V), a game that has consistently ranked among the top 20 most-played games on Valve's Steam Deck for over two years, is now listed as "unsupported" by Valve. This unexpected change comes after Rockstar Games,

The reason for Valve listing Grand Theft Auto V (GTA V) as unsupported is that the developer, Rockstar, has reportedly disrupted compatibility with Valve's handheld for its online modes