5 Days a Stranger

The freeware horror-themed point-and-click adventure 5 Days a Stranger is the first part of the The Chzo mythos. It tells the story of a cat burglar named Trilby who sets out to steal the family valuables from the manor of the recently deceased Sir Roderick DeFoe. But once Trilby gets inside, all the doors and windows are locked, and he cannot get out. Soon he realizes that four other people are trapped in the house as well and the house has a reason for keeping them there - a truly sinister one...