I didn’t play Atari, so i can’t say what was hot then, Pong perhaps? Asteroids?
You can include PC and Handheld systems as well if your best game was on there. I know pokemon and zelda were big for handheld, and of course everyone remembers Doom and Quake.
Nintendo: Narc. I loved Mario, that Karate game, and Duck hunting as much as the next kid, but Narc was my game. Had the action, always fun to play.
SNES/Sega: Streets of Rage 2. I loved Final Fight, i loved SoR(1), and of course Super Mario World and WWF Royal Rumble…but damn, SoR 2 was THAT game. Anyone whose anyone remembers Skate.
Playstation/N64/Sega Saturn/Dreamcast: This is very hard. So many classics…i’ll have to come back to this one. Believe it or not, Army Men: Sarge’s Heroes is high on that list. But this may be the greatest generation for gaming, and that’s not even including PC.
PS2/Gamecube/Xbox: This is very difficult too, especially since i loved the wrestling games this generation, not to mention all the variety in fighting and RPG games…but…Suikoden. My all time favorite game series. I wish it wasn’t dead. Suikoden 3 get it for me.
PS3/360/Wii/Steam: This was a weaker generation in my opinion. The previous Gen was really good that i expected so much more. This gen i don’t game as much, but when i do…its Gears of War. From the first til Judgement, the series has been awesome for me. Its the game i will remember when i think of this generation.