The only XBLA games I have is Undertow and Poker Smash but that's it. I'm not sure what are good XBLA games or which games are lame. What games are really worth the MS Points?

UNO is probably my favorite.

Geometry Wars is probably my favorite, although I also really enjoyed Marble Blast Ultra.

Geometry Wars is the best xbla game (confirmed)

I really like Poker Smash and Feeding Frenzy is a little guilty pleasure of mine.

Geometry Wars.

I've spent a TON of time on Uno though.

Puzzle Quest or Catan

I actually love UNO.

UNO & Geo Wars.

I guess UNO is my favorite because there's online.

Its a toss up between Puzzle Quest and Pac Man CE.

Wow I didn't know that uno was so popular.

The right answer here is Uno.

That's easy, Geometry Wars.

N+, although i'm getting an ulcer playing that game. Ikaruga is also a favorite of mine.

If you have Gold, Uno. If not, Puzzle Quest.

Castlevania: SOTN.

Castlevania is my favorite as well.

Wasn't this exact topic posted before?

My personal favorite arcade game so far is N+. Although with all the new neat titles coming out soon I'm guessing that will change.

Hard to choose one particular title. I have enjoyed playing Castlevania: SOTN, N+, UNO, Prince of Persia, Pac-Man C.E. and Jetpac Refuelled. If i'd have to narrow it down my top 3 would be: Prince of Persia, Castlevania. SOTN and N+. In no particular order (Well okay, maybe a shared first place for PoP and SOTN and N+ in a close third :-p).

street fighter 2:HF or UMK3. cant wait for Street Fighter 2 HD REMIX

Geometry wars, Pac Man Championship Edition, and Poker Smash are my favorites.

Geometry Wars, Hexic HD, Pacman Championship ed., Castlevania, Penny Arcade Adventures, Puzzle Quest, REZ HD and Uno.

I don't regret buying any of those except for Hexic, which I got for free. XBLA gets bashed for having garbage, but there are a lot of good games on there. You should check out the board game remakes like Carcassonne and the like...
My favorite is REZ HD. So damn trippy.

Assualt hereos, puzzle quest and SouCalibur are my faves

Geometry Wars. I can't friggin' wait for the sequel. Multiplayer is gonna be sweet.

Geometry Wars

My favorite so far has definitely been Alien Hominid. Right now I'm really looking forward to Bionic Commando Re-armed, Geometry Wars 2 and Castle Crashers.

Right now, Geometry Wars.

Cloning Clyde

Probably Marble Blast Ultra, though I haven't bought N+ yet and I really liked the demo

Marble Blast Ultra....seriously, I was addicted to that game for weeks after I bought it.  Started playing again a few weeks ago and almost got addicted all over again.

Puzzle Quest.

I spent a big chunk of time on Contra to get all the achievements. It was pretty fun though.

Dunno i dont play many arcade games but really want to get into a good one.

Puzzle Quest
TMNT
Castlevania: Symphony of the Night

"Dunno i dont play many arcade games but really want to get into a good one."

Mortal Kombat

I generally think XBLA games are a waste of money.

Alien Hominid HD.

"I generally think XBLA games are a waste of money.
"

N+

none really, but i play carcassone (sp?) now and again

"N+ is addicting as hell, and incredibly difficult...I love it. Worms is fun, too. Castle Crashers will be my go-to game pretty soon, and possibly one of the best on XBLA
"

UMK3 or castlevania

Super Puzzle Fighter II Turbo HD Remix, Puzzle Quest and Worms.

"Alien Hominid HD.

looks at avatar...

>.>

"

Doom is definitely a favorite of mine...