I don't believe anyone mentioned Virtua Racing. I was the only Sega cart that used a special DSP chip to push a ton of polygons. Plus AM programming. Great game, pushed the Genny to it's limit I would have to say... DSP chip was to compete with SNES Star Fox and Doom FX Chip. Sadly, only game to use it was VR... Even Virtua Fighters didn't use the chip but had close graphics... Hope this helps...

Also, Definately Zero Tolerance (Doom Clone) Also Duke Nukem and Bloodshot (both Doom Clones that were only Euro / Austrailian released).

All three of these games were first person perspective games.