3. Half-Life (PC, 1998; PS2, 2001)
Platform: PC, PS2
Gordon Freeman taught millions of gamers what one can do with a crowbar, and it's a lesson they've taken in stride. Try, for example: Fighting off an invading alien horde teleported into the Black Mesa compound, while also holding off black-ops soldiers attempting to cover up government secrets with a tool that's usually used for opening shipping crates. Impressive, no? Not bad for a simple lever. Half-Life is considered one of the best titles in all of gaming history. We can argue the finer points of Katmari Damacy later. The title received more than 50 Game of the Year awards and helpied make horn-rimmed glasses the de facto eyewear of alien-killer-cum-scientist aspirants. And this all goes without saying, but yes: We're all still waiting for a third installment into the franchise to propell this game a little closer to the top spot. Still. After all these years.