BattlEye is a proprietary anti-cheat software designed to detect players that hack or abusively use exploits in an online game. It was initially released as a third-party anti-cheat for Battlefield Vietnam in 2004 and has since been officially implemented in numerous video games, primarily shooter games such as PUBG: Battlegrounds, Arma 3, Destiny 2, and DayZ.BattlEye supports Valve Corporation's Proton compatibility layer and is usable on the Steam Deck.

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