Wolfenstein 3D took place during World War II, where you played one BJ Blazkowitz, a soldier on a mission to escape from Castle Wolfenstein, occupied by the Third Reich. On top of the game's interesting foes, it also had one of the longest campaigns you'll come across in the FPS genre.

A prisoner's ship crashes on a mysterious planet where the mystical Nali race is being subjugated by the cruel and technologically advanced Skaarj. Unreal, with insensible seriousness, intertwines the feel of the medieval Nali architecture and culture with the sci-fi design full of the forgotten weapons and knowledge. In Unreal, each opponent attacks with its own style, using a combination of melee and ranged attacks.

In Far Cry, you play as Jack Carver, a guy who's been hired to sail a mysterious woman around the Pacific. Everything in this game looks amazing, and the level of verisimilitude is unprecedented. Jungles actually feature dense foliage that consists of trees, plants, and tall grasses, and this foliage is filled with birds and insects. Beaches have blinding-white sand, and the surf slowly laps ashore.

The game just takes the basics of the Dune storyline and runs with it. Your job is to build a functional base using the facilities on offer, and create an army worthy of defeating the opposing force(s). You can choose any of the houses Atreides, Harkonnen or Ordos. The single resource in the game is the Spice, which must be collected by harvesters. The spice is converted to credits in a refinery, which are then spent to construct additional buildings and units. It is a wonderful game and started all RTS games to date.

One of the most known puzzle video games originally designed and programmed by Alexey Pazhitnov in the Soviet Union. Pazhitnov told he liked the fact that the game is so well known but he's not really all that bothered by personal gain or fame.