Any Unreal Tournament game. So far, in the series for a fanboy like me.. There hasn't been any let downs only sick and twisted improvements. With the graphics improving every step of the way, and the game modes being harvested in masses, there is nothing wrong with any UT. If we're speaking all consoles then... Here's my list.
PC: UT Series
PS2: Hitman Series
PS3: UT3
Xbox: Halo
360: COD4
SNES: Super Mario Brothers
Game Boy: Pokemon (Gotta Catch'em All
)
There is probably a lot more.. I just can't think... Being 3:12AM, posting this stuff.