IN Warhammer 40,000: Inquisitor – Prophecy History unfolds in the Caligari sector. Protagonist – Inquisitor. He has to study the reasons for the giving signal from this region. It turned out that someone from the fortress-monastery martyr got into trouble. This building was absent for more than 5 thousand years. Caligars and their leader Tiberia went there. Arriving at the place, the team finds out that Klosterheim was ahead of them. The basis of the game is the battles of the protagonist with opponents. Developing the hero, he gets new passive skills. They positively affect the characteristics – strength, maximum number of health points, protection and others. The character's capabilities during the battle directly depend on the type of weapon used.

In Warhmmer 40,000, an inquisitor can be selected for a hero of which grade to play: a psiker, a crusader or assassin of a death cult. Subclasses are also present: Technoadpect-venuator, a province, an attack aircraft, a sniper, a saboteur, etc. It is possible to protect against the damage of the opponent not only with the help of weapons, but also of shelters. The user will have a choice – join the radical or Puritan movement of inquisitors.

Types of opponents are several dozen. Of the new ones, these are choirmagounts, denser, zoandhropes, tyranides and others. The main inventory of the hero consists of implants (nervous, eye and main), puritan seals, explosive devices, armor. A monocardor is needed for a Bust Damage or treatment. With him the protagonist always has 1 main weapon and additional. Each gun should have a signs if standard power is not enough.