In Warhammer 40,000: Inquisitor - Martyr, a powerful agent of the human Empire is sent to clean up the Caligari sector, which is in chaos. The dark RPG offers a variety of inquisition classes, a variety of factions, terrain settings, additional story missions and exploration. The plot and mechanics continue the Warhammer series of games. One day, a distress signal is heard from the Tempestus segment, located in Caligari, which is encrypted using special ancient inquisitorial protocols. The hero-inquisitor is sent to study the situation and find the source of the signal, and discovers a monastery fortress called Martyr, which operated during the Age of Apostasy, namely - 5 thousand years ago it disappeared into the warp. The Conclave is trying to find out the secrets of the Martyr, as well as the history of its leader Uther Tiberius. Upon arrival, the agent realizes that there was an expedition of Stormguard Space Marines here, as well as the head of the Inquisition, Klosterheim. At the start, the player chooses from 3 available classes, where each has several subclasses.Character classes, varieties:
- Death Cult Assassin - or Assassin, this includes such subclasses as Sniper, Saboteur, Fighter.
- Crusader - this includes the Heavy Gunner, Assault, Crusader Tactician.
- Psyker - among the available ones are the Imperialist, Ethereal Traveler, Techno-Inquisitor and Seer.
Warhammer 40,000: Inquisitor - Martyr has an open world, where the sandbox mode operates, a variety of missions with the possibility of using tactical moves are implemented, and a destructible environment with the ability to use cover and perform spectacular executions is also implemented. In the process, the user explores Caligari, moving through sectors, Solar Systems and points of interest with different planets with distinctive relief, passing through the buildings of abandoned fleets and infected stations. As the character progresses, he fights opponents using passive skills that affect defense and damage in battle, the number of life points, as well as active ones that depend on the weapon and equipment used in battle. For items, the strength parameter is in effect here and the task rating is equal to the rating of the equipment worn by the hero, which affects the ability to inflict or receive additional damage. The protagonist joins the British or radical movements, for which he receives some bonuses.