Kalaban is a horror-themed 2D action-adventure. The game focuses on story-telling and open-ended gameplay. The game is set in the year 1995, in an alternate history version of Finland. The main character of the game is Bob, a hermit and an American who has moved to Finland. Bob's cabin is attacked by a mutant monster, which triggers the story. He must find out what is going on around him and discover the reason behind the weird outbreak.