Shatterline is an arena FPS with a roguelike co-op mode (Expedition) as well as several traditional PvP modes such as TDM, Conquest, Plant-the-Bomb, and Escort. Players can choose Operatives and an armory of weapons that can be customized via attachments. Set in the near future, where humanity faces a threat of cosmic proportions. Players take on the roles of the Immunes – bearers of an extremely rare genetic combination that allows their bodies to resist the alien plague.