For me it's Teenage Mutant Ninja Turtles IV: Turtles in Time for the SNES.
I've played it and beat it so many times especially on the Cowabunga Collection but I never tire of playing it.
The soundtrack slaps too.
Hard mode is really easy and it's the only way you see the real ending.
Michigan Wolverines 30 to Ohio state 24: 11/25/23
Michigan Wolverines Football:15-0 ,Rose Bowl Champions&National Champions