In no particular order:
House of the Dead
Virtua Cop
Virtua Fighter 2
MArvel vs Street Fighter
Panzer Dragoon Saga
Thunder Force V
Shinobi: Leigons
Galactic Attack
The King of Fighters '96
Langrisser IV
Samurai Spirits IV
Sakura Taisen
Saturn Bomberman
Nights
Don Pachi
Soukyu Gurentai
Burning Rangers
Sentimental Graffiti
Panzer Dragoon
Street Fighter Zero 2
I'd reccomend avoiding:
Lunar: Magic School - Whoemever wrote the story to this game should be shot, no wonder Working Designs wouldn't touch it with a 10 foot pole (not that I like WD)
Albert Odyssey - Yo Mamma' jokes don't sit well with me in video games. There was defenitly a lot of rewirting for American audience sint his script
Terra Phantastica - This game just never really got going. Pretty artwork though
Dragon Force 2 - Nowhere near as good as the original and the original wasn't all that impressive
Langrisser III - Unless you're a diehard fan of the Langrisser story, this game doesn't offer much for you
Konami MSX Antiques Collection - A very collectable disc, but unles you really want to play these games ona saturn instead of on your Dreamcast or PC ina n emulator, it's not worth your time
Sakura Taisen: Joukai Rajio Show - A hardcore fan collector disc. Not worth it unless you're a raving fan of the series
Sonic Jam - Aside from a save feature and being able to watch the commercials, it offers nothing that the original 4 sonic games didn't on Genesis
Final Fight Revenge - I love final fight and I own this disc but I'll level with you, it's a very very lame game and shouldn't be bought unless you really just love the idea of playing as Haggar in a 3D fighter.