Bungie's upcoming shooter Marathon will use BattlEye kernel-level anti-cheat, effectively ruling out Linux and Steam Deck compatibility at launch. The game's Steam page confirms the anti-cheat system, which Bungie has previously implemented without Linux support in Destiny 2. This decision aligns with a trend among large studios hesitant to add Linux support.

The move comes as Linux gaming grows, with Steam Survey data showing its user base at 3.8%. Valve's Steam Deck has pushed developers to consider Linux, but anti-cheat remains a major hurdle. BattlEye technically supports Linux, but developers must enable it—an extra step Bungie appears to be skipping, citing potential workload or security concerns.

With Marathon launching in March, the lack of Steam Deck verification signals a missed opportunity for a growing market. This reinforces a divide in the industry: while indie and some AAA titles embrace Linux, major multiplayer games often prioritize Windows. For Linux gamers, it's another reminder that platform support hinges on developer commitment, not just technical possibility.