Two expansions were later released, each adding a new faction: the Witch Hunters in June 2016 and the Undead in October.
Mordheim: City of the Damned is based on the Mordheim tabletop game, which is a skirmish-oriented derivative of the larger Warhammer Fantasy wargames. Accordingly, the video game puts the player in control of a small warband that fights rival teams over resources around the titular city of Mordheim. At the start of the game, the player chooses a faction (Sisters of Sigmar, Mercenaries from the Empire, Skaven, or the Cult of the Possessed in the base game) and over the course of the game, is given to opportunity to improve their warband's strength by recruiting, leveling, improving and customizing a roster of combatants as well as their equipment. Losing battles can lead to permanent injuries or even death of the members of the player's warband, so the emphasis is on careful engagements and survival.
The game received mixed reviews, gaining an average score of 76/100 on Metacritic. Some reviewers praised the "pleasantly morbid" atmosphere and deep game mechanics as befitting the tabletop original, but the game AI, steep and unforgiving learning curve, and technical issues (particularly user interface and load times) were described as frustrating.
Rock, Paper, Shotgun was particularly critical of the "uninspiring", "unexciting" and "languid" combat, calling the game "dumb" and "flawed".