10. Blazing Star
There are several shmups (shoot 'em ups) for the Neo Geo. Most are pretty good, but this is my favorite. The game looks great, with rich, detailed levels and smooth game play. Not too easy or too hard. Fun power-ups and weapons.
9. Magical Drop III
I started playing this puzzle game recently. It's pretty addictive. Much more fun with 2 players than 1, but great nonetheless. I still haven't figured out a foolproof strategy. Sort of similar to Columns, but with a top-down push/pull instead of just push.
8. Garou: Mark of the Wolves
There must be 50 fighting games for the Neo Geo. Many are terrible. Garou is an exception. Great graphics, solid physics, and a character named Butt. What more do you need? Yes, there's the King of Fighters series, which has a few decent titles, but Garou just feels better to me. I have to admit that I only like a couple of Neo Geo fighters. I'm much more into Capcom's fighters, but SNK has a few winners, including this one.
7. Nightmare in the Dark
If you like zombies, and you like Bubble Bobble, then you'll love Nightmare. Plays almost exactly the same as BB, but with huge boss characters every few levels. In the game, you're a graveyard caretaker that lights zombies and mummies on fire. Awesome.
6. League Bowling
It's no Wii Bowling, but it's a stripped down, fun as hell bowling game with goofy animations. One of the first Neo games, and one of the best.
5. Neo Mr. Do!
A remake of the original 80's arcade hit, Mr. Do!. The original can't hold a candle to this one, though. The game is the same, but the feel is far more smooth, and the graphics are cartoony, crisp and colorful. The cut scenes are goofy, but well done. I'm actually getting pretty good at this one, which should tell you how often I've been playing it. Overall, a beautiful and fun puzzle/action game.
4. Neo Turf Masters
Greatest golf game ever, hands down. Golden Tee and Tiger Woods got nothing on Turf Masters, as far as I'm concerned. The simplicity of the game play is what makes it so great. The courses are well designed, and frankly, quite difficult. If you can stay under par for a round on hard difficulty level, that's an accomplishment. If you like golf games, you'll love this one.
3. Metal Slug 3
Any game where you can turn into a zombie and puke blood on your enemies is going to make it into my top 10. I love this game. Like the other MS games, it's basically a run 'n gun (i.e. Contra) on steroids. This one is unique, however. You can play though it a total of about 72 different ways because of all the possible paths available, which makes for huge replay value. The graphics, bosses, gameplay, and overall fun are all way up there.
2. Baseball Stars 2
Best baseball game ever. Basically an updated RBI Baseball. Great graphics and gameplay. The power-ups in this one are unique to baseball games, at least that I've played. Neo Geo isn't necessarily known for its sports games, but this one is a winner.
1. Puzzle Bobble/Bust-A-Move
The funnest puzzle game since Tetris. The game is really simple, but really tough to master. Match the colors, that's it. There are many sequels to this one, with powerups and other bells and whistles, but the stripped-down original is the best. My girlfriend and I have an ongoing competition to set the high score on this one. She's way better than me.