Haaard
OK, I haven't been gaming for 30 years like some of the guys here, but ~18 is a lot, too. By platforms:
Amiga - UFO, Speedball 2
PSX - Metal Gear Solid
PC - System Shock 2, Wizardry 7
Xbox - Morrowind, Fable
PS2 - GoW 1, 2
etc.
I'm sucker for anything with great storytelling...
