Even though both of them have anti-cheat that blocks Linux platforms from playing online, Valve have suddenly rated both Grand Theft Auto V Enhanced (and so GTA Online) and Rainbow Six Siege as Steam Deck Playable. #GrandTheftAutoVEnhanced https://gamesense.co/game/grand-theft-auto-v-enhanced/news/discuss/surprisingly-valve-rated-grand-theft-auto-v-enhanced-and-rainbow-six-siege-as-steam-deck-playable/