If you can appreciate a version of a game on a console even if better versions exist elsewhere, I had a lot of fun with
Wolfenstein 3D on both Jaguar and 3DO, but the 3DO version looked
so much better.
Doom on Jaguar is also cool.
Raiden and
Rayman are two more solid Jaguar games. 3DO also has
Puzzle Bobble,
Samurai Showdown,
Super Street Fighter II X and
Policenauts and the Policenauts "Pilot disk" (or what ever it's called). Policenauts 3DO is a little different than the Playstation and Saturn versions. I believe that it has the Snatcher style talking heads, which alone makes it worth playing.
I think that the 3DO version of
Flashback is supposed to be the best on consoles. There's also
Out of This World which I'm sure is a solid port, but I seem to remember that there's something about it.
Cannon Fodder is supposed to be good and I believe that it's on both systems. People have said good things about
The Horde for 3DO, another sim game that I gave up on after half an hour (but I don't like sims).
The Incredible Machine for 3DO looks like it could be a lot of fun if you spend enough time with it.
Jaguar has
Worms and 3DO has
Lemmings.
The game I bought a 3DO for and which didn't disappoint is
Lucienne's Quest. It was probably the first 3D "JRPG" that came out over here. There's Saturn port (Swords & Sorcery), but it's not nearly as good.
Oh man, i had forgotten how horrible the music in Way of the Warrior was. Perhaps the worst music in any videogame?
I believe that White Zombie did some or all of the soundtrack. Probably pre-La Sexorcisto by the sounds of it.