Listed as Game of the Year by nearly all (if not all) of the major gaming publications, this first person shooter is excellently done. From the gripping story, to the wonderfully scripted AI, this game will have even hard core gamers coming back for more. Many people complain about the late game "jumping torture" areas, but all in all this is a wonderfully designed game that raises the bar for all games to come.

Also, it offers a graphics and AI engine that is hugely editable, allowing a vast number of Single Player and Multiplayer mods. To date, no game has matched its appeal or sales figures: and still it tops nearly every list of games.