Bloody Roar/Beastorizer 1,2
Crash Team Racing
Robotron X
Bust a Move/Puzzle Bobble
Apocalypse (great Arcade feel. Too bad there's no 2 player mode)
The Gundam Fighting Games
Devil Dice
Older Twisted Metal Games
Jet Moto Series
Cool Boarder Series
Need 4 Speed (all 10 million of them)
Fisherman's Bait 1,2 ( A fun fishing game for 2 players. Beware needs controllers)
The two X-men fighting games
The million flight sims
Pepsiman (because nobody believes it till they see it)
The One Piece fighting games (kinda like Smash bros. Just not as good)
The million Wrestling games
Rakugaki Showtime (like Powerstone for the DC or Smash Bros)
Silent Bomber (like Bomberman made serious for the arcade)
Gunner's Heaven (like Metal Slug)

Guilty Gear
The Contra games
Parappa The Rapper (one player rythm game)
Bust a Groove 1, 2 (rhythm game mushed together with fighter)
Arkanoid Returns
Psychic Force 2 (Tekken and destrega had a baby)
Destrega (the fighting game that uses range)
Thrill Kill
Brave Fecer Musashi
Hot Shots Golf
Project Gaiaray(virtual On kinda)
Odo Odo Oddity ( can cure insomnia put game speed at 3X atleast)
Harmful Park (sidescrolling Shooter)
Tomba
Johnny Bazookatone
Die Hard Trilogy
The mortal Kombats
The Streetfighters
Darkstalkers
Hokuto No Ken (Fist of the Northstar)
If you're into Gun Games:
Area 51
Crypt Killer
Die Hard Trilogy
Die Hard Trilogy 2: Viva Las Vegas
Elemental Gearbolt
Extreme Ghostbusters: Ultimate Invasion
Galaxian 3
Ghoul Panic
Gunfighter: The Legend of Jesse James
Judge Dredd
Lethal Enforcers 1&2
Maximum Force
Mighty Hits Special
Moorhuhn X
Point Blank series
Project Horned Owl
Rescue Shot
Revolution X
Resident Evil: Survivor
Simple 1500 Series Vol.024 - The Gun Shooting
Simple 1500 Series Vol.063 - The Gun Shooting 2
Starblade Alpha
Time Crisis
Time Crisis: Project Titan
If you're into making custom controls (and who isn't)
Pop n Music Series
The DDR games