I don't feel like a lazy bastard myself for just listing the games. If a person is curious enough they can look it up for themselves. I know I listed a decent amount of unique games that no one listed. Off the top of my head they would be
Magic Carpet (PC) - gem back in the day and was a very interesting and fun game concept, funny that EA has let all their amazing ideas/series die.... Road Rash, Desert Strike, General Chaos, Magic Carpet, etc... It was as if they bought studios and let their ideas die
General Chaos (Genesis) - keeping my EA boycott till they release another
Starsiege: Tribes (PC) - which I consider one of the most innovative FPS, I regard the play style/concept way better than Halo and it was one of the first games that supported more than 15+ players at one time (I forget the limit but it was probably around 20-30 and I was rocking a ISDN while over 95% of the players were on 56k),
Worms Armageddon (N64) - I know the game was listed but it was either the PS or PC version which I consider the N64 the best for 4 player local multiplayer matches.
Metal Slug Advance - I know a few listed other Metal Slug games but I highly doubt anyone listed this one. It is the only Metal Slug to have a life bar instead of instant death. Was a very fun handheld game and I consider it one of the best Metal Slug titles. A lot of effort was put into the game and it shows.
Civilization 3 (PC) - I don't even have to look and can guarantee that someone listed one of the Civ games in their list. However, I don't think anyone picked number 3 which was bad ass.
Command & Conquer: Red Alert (PC) - I'm sure someone listed the first game but not too sure if anyone picked Red Alert. I enjoyed the first game a lot but I felt that Red Alert made C&C top notch standing on top next to Warcraft series.
Super Paper Mario (Wii) - most Paper Mario fans consider it the bastard child but I really enjoyed this game despite all the negativity. Perhaps it was because I was stoned 95% of the times I played this game or that I loved the flipping 2D to 3D to solve little puzzles / figure out where to go. Maybe someone listed it but I doubt it.
Ikaruga (GC) - insanely hard game. I give props to anyone that can beat it because I can't...