Warhammer 40,000: Inquisitor - Martyr is an action RPG set in the Warhammer 40K universe. The player takes on the role of an Inquisitor in the Caligari Sector, a region plagued by heretics, mutants, treacherous Xenos, and the demons of the Chaos gods. The title offers various single-player and cooperative multiplayer modes, allowing player progression in a persistent world filled with a variety of missions with different objectives. Three complementary classes are available in the game, and their characters fight through destructible environments that provide necessary cover to survive both tactical and brutal confrontations. As the first action RPG set in the grim future of the 41st millennium, it elevates the genre to a whole new level: a sandbox game in an open world full of diverse missions, tactical and brutal combat in destructible environments, and a storyline influenced by the player community.