Warhammer 40,000: Darktide is a first-person action video game set in the Warhammer 40,000 universe, being developed and published by Fatshark. The game's story, written by author Dan Abnett, will focus on a squad of Inquisitorial Agents investigating a potential Chaos infiltration on the planet Atoma Prime in the Hive City of Tertium. The game will use a similar formula to that used in Fatshark's Warhammer: Vermintide 2 in which four players cooperate to defeat periodic waves of AI-controlled enemies. Rather than a set of pre-made characters, the game will allow players to customize their class, appearance and gender. The four classes consist of a Veteran, Zealot, Ogryn and Psyker. All classes will make use of a regenerating shield. Unlike in Vermintide 2, multiple missions will take place in the same area, some of which will include optional secondary objectives that allow players to obtain better loot. Difficulty will be divided in two variables, one affecting enemy count and the other damage received from enemies. Progression will be split between random rewards, an in-game currency that will allow the purchase of weapons and a contract system to earn a weapon of your choice. Crafting will also allow the player to upgrade their weapons and increase their stats.