I forgot about those! Played 1 & 2, spent hours sneaking in dark places, timing the movement of guards. Got into console games just after Thief 2 was released.
Hard to say, so I am gonna have to break it down by category: RPG (i know its an mmo, but anyway): Everquest - that was the sickest... when you loaded that baby up for the first time, it was like WOW this is an entire world! Was pretty awesome. Fighting Game: Mortal Kombat 1. The combos were the best, the game glitches were very fun and cool to do. They were not retarded glitches. RPG (single player offline) Dragon Age Origins