26. "Half-Life"

Critic score: 96/100
User score: 9.0/10
Plot summary (from Metacritic): "Half-Life combines great storytelling in the tradition of Stephen King with intense action and advanced technology to create a frighteningly realistic world where players need to think smart to survive. Half-Life has won more than 50 Game of the Year awards from publications around the world, and was named 'Best PC Game Ever' in PC Gamer's November 1999 issue."
Homeworld, Deus Ex, Max Payne, Diablo, Hitman - to mention a few.
Half Life deserves a better score and trash like Tekken or SoulCalibur should not even be on this list.