Daemon Summoner is a first person shooter that takes place in 1888, during the Victorian era of England. Players take on the role of James Farrington-Higgs. His infant son, David, has just been murdered and his wife Emily has been turned into a vampire. Now James wants to find his wife in order to kill her and put her out of her misery.
Along the way, James has to deal with many creatures such as imps, ghouls, werewolves, and vampires. James uses an assortment of weapons to defeat these creatures, with some examples including a crossbow, a revolver, and holy water. The game features seven expansive levels taking place all around London, interspersed with moody cut scenes. The game also features three difficulty settings to choose from.