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.

The year is 2028. The Earth is being slowly overtaken by the Crystalline – a gigantic interstellar super-organism that devours planets and transforms living species in its own image. This enemy cannot be bargained with, or fought with conventional means.

While humanity fears the cosmic plague, there are some who see it as a blessing. The Strafe Witnesses – an army of fanatics, – aim to subdue the Crystalline, and use it to uplift themselves to the next stage of evolution.

Between hope and the end of the world stands Shellguard – a small company of individuals immune to the Crystalline. These lucky few are involuntary carriers a rare genetic combination that provides resistance to the alien taint. Only they can stop the Crystalline – or allow it to change our world forever.