Warhammer: Mark of Chaos is the computer adaptation of Games Workshop's popular tabletop game, Warhammer Fantasy Battles. It is a real time tactical/strategy game where the armies are moved on a turn based Strategy Map. Here they can enter huge cities, meet NPC characters or join battles. These battles are then played on huge, real time battle maps.
In the single-player mode the player can play on both the good side (controlling the armies of the Empire, High Elves and Dwarfs) and the bad side (controlling the armies of Chaos and the mysterious Skaven) in two campaigns. Both are divided into four different chapters with 5-6 unique battles in each.
Besides the single-player campaigns there are several multiplayer modes as well (e.g. normal battle, siege, reinforcement battle) that can be played via internet or lan.