An apparent dispute between Rockstar and Valve has left Grand Theft Auto 5 to be listed as unsupported by Steam Deck.

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

Grand Theft Auto V was one of the top ten most played games on Valve’s Steam Deck handheld this past week. It’s been in the top twenty for at least two years. But as of today, Valve now lists the game as “unsupported” — because developer Rockstar mysteriously broke compatibility with Valve’s handheld for its online modes.

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

NoPixel, a popular roleplay server for Grand Theft Auto 5, is home to a number of talented streamers who help keep the roleplaying fresh and engaging.

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.

You may have noticed that Grand Theft Auto V is no longer verified on Steam Deck. That's seemingly because of the BattlEye new anti-cheat software for GTA Online, which rolled out earlier this week. As Rockstar explains in its official FAQ,