Off Genesis, any of the Sonic Games
Off Game Gear (I still has one! Remember Game Gear?!), NHL 95, mostly. Toronto, Montreal and Detroit were so OP in that edition!
On PC, DOOM95 Multiplayer with friends, the first UT (UT03 was still a year out), and Age of Mythology.
Finally, on N64, Mario64, Super Smash Bros, and the 2nd best shooter of all time (next to DOOM), Goldeneye.