The Stanley Parable Demonstration is supposedly the demo for The Stanley Parable, but has an original storyline and can be considered a short stand-alone game.
Gran Turismo Concept is a racing video game in the Gran Turismo series. It is essentially a short version of Gran Turismo 3: A-Spec intended as a preview for the full release of the game. For undisclosed reasons, the game was not released in the North [...]
Gran Turismo 4 Prologue is a racing video game in the Gran Turismo series. This short version title preceded the release of the full-length version Gran Turismo 4 in 2004. For undisclosed reasons, the game was not released in the North American market. [...]
Originally planned as a section of the Highway 17 chapter of Half-Life 2, Lost Coast is a playable technology showcase that introduces High Dynamic Range lighting to the Source engine.
