GTA V, one of the most popular Steam Deck games, is now 'unsupported'
Briefly

"As of today, Valve now lists the game as 'unsupported' - because developer Rockstar mysteriously broke compatibility with Valve's handheld for its online modes."
"Rockstar has decided not to support the Steam Deck with its new anti-cheat software for GTA Online - a game that, by all accounts, badly needs to deal with cheaters."
"It's blaming Valve for the problem, claiming that 'Steam Deck does not support BattlEye for GTA Online' and directing all further questions to Valve."
"Valve has said that enabling a game with BattlEye to run on Steam Deck is literally as easy as sending an email."
Read at The Verge
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