The Deathwatch are the elite of the elite. Players control a Kill Team of five Space Marines to fend off a Tyranid invasion. In this turn-based strategy game, each marine has a number of action points (similar to the Space Hulk board game or the old 1993 video game, but most familiar to Rodeo's previous iPhone/iPad release, Warhammer Quest). Marines use action points to move, shoot or go on overwatch. Setting up overwatch and lanes of fire is crucial as the player moves the Kill Team to each mission objective, often through narrow, twisting corridors. Marines gain xp which may be spent on abilities, traits, and stats. Players can use loot drops at the end of missions to customize marine weapon loadouts.