Old Evil is an adventure horror game with a first-person view. The game takes place in the fall of 2018 in a wooded area in the vicinity of the city of Witch Hills. A squad of recruits from a private military organization got lost during a training exercise and stopped communicating. Cedric Still, as part of a search group, is sent to the recruits' landing site. Soon he was absorbed by the local swamp substance, after which he woke up in a completely different world, where darkness, despair and fear reign. You have to try to save your colleagues and try to get out of the cycle of horror.