Not console game, so not belonging to gen per se, but it is 1992 and I still play on Amiga 500 - in Europe, Mega Drive is 2 years old, SNES and Amiga 1200 just released, and none of those systems, while all being somewhat better than 5 year old hardware of Amiga (technically 7, since Amiga 500 has pretty much same hardware as first Amiga, A1000), are really having wow factor for me (technically speaking). That I bump into this:
Comanche: Maximum Overkill (1992, PC)
This (along with Ultima Underworld and Wolfenstein 3D, both from from same year) is what cemented what my next gaming system is.