Deja Vu: A Nightmare Comes True!! is the first game made by ICOM, known for its adventure games such as Shadowgate and Uninvited. It featured mouse support, a multi-window interface, and bitmapped graphics at a time when text-based interactive fiction was the norm.
In Deja Vu: A Nightmare Comes True!! , action takes place in Chicago in December 1941. You play as Theodore "Ace" Harding, a retired boxer working as a private eye. He wakes up in a toilet stall of a sleazy pub with no memory of who he is or what he is doing there. To make matters worse, you stumble upon a very dead corpse upstairs with three bullets buried in him. Sure enough, you find there's a gun in your pocket with three bullets missing. You have to figure out what happened and who you are before whatever is happening to your brain turns you into a mindless vegetable. The cops would very much like to have a word with you about that stiff.
Gameplay involves exploring the environment, interacting with characters, and solving puzzles to uncover the mystery of Theodore's past. The game features challenging platforming sections, combat, and a variety of mini-games.