Kalaban is a horror-themed game with an emphasis on storytelling. 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.
There are different weapons with a limited amount of ammo, the character has to find food to regenerate his vitality, and there is a large inventory system. The game is not linear and lets the player explore freely.