Alien Ambush

Creator: Star Gaming Network
Genre: Classics
Price: 200 Points

Trial Play: A Space Invaders / Galaga clone. It's also not very good from what I could see from the trial. Enemies follow very simple patterns and overall just seems a little boring. Sorry, Star Gaming Network.

Loot, Steal 'n Destroy

Creator: reallyjoel
Genre: Action & Adventure
Price: 400 Points

Trial Play: A game about looting gold from the source and from your enemies. The game is multiplayer only, but looks like it could be some fun. A hearty opening theme too.

Blow

Creator: David Flook
Genre: Other
Price: 400 Points

Trial Play: One of the best games on the service right now, Blow is a entrancing puzzle game where you set up fans in order to blow bubbles through checkpoints and on to the exit. The game relies on you setting the speed of the fans, and whether they can make bubbles hot (and rise) or cold (and fall faster). Sporting 70 man made levels and infinite procedurally generated levels for endless variety, it is absolutely worth your 400 Points.

Colosseum

Creator: Shortfuse Games
Genre: Fighting
Price: 800 Points

Trial Play: Here we have one of most expensive XNA Community Games, Colosseum. It's a 4 player brawler which uses the second analog stick for combat. While it looks nice, the single player experience appears to be pretty mundane. It will probably be at its best in the local multiplayer modes.

Totem

Creator: Fervent Interactive
Genre: Puzzle & Trivia
Price: 400 Points

Trial Play: Totem is a single player puzzle game involving a variety of totem pieces. Each stage is about surviving through whatever the computer throws at you.You then stack up several totem pieces of one color, and when the next comes crashing down, the matching ones break. It's simple and a bit of fun, and has some nice artwork too. Reminds me a bit of the GameBoy Mario & Yoshi title with a dash of XBLA's TiQal.

Artoon

Creator: Oscar K
Genre: Platformer
Price: 400 Points

Trial Play: Bounce your buddy Art through tens of levels as you rack up a multiplier by jumping on new squares in the level. It looks nice - Oscar K has his head around some very neat shader effects, it has some decent techno music, and it includes a split screen challenge level too. The first few levels are very simple, but do the later ones offer any challenge?

Galax-e-mail

Creator: BogTurtleCarl
Genre: Shooter
Price: 200 Points

Despite the crazy premise, this game is actually quite fun. The graphics, while simple, are consistent and very clean looking - it "knows" what it is. I'm not really sure just how the game does work in terms of levels (does the game simply generate a level based on difficulty) but for 200 Points it looks like it may be worth your money.

In the Pit

Creator: luvcraft
Genre: Action & Adventure
Price: 400 Points

Trial Play: Now here is something that can only be done on XNA - In The Pit is not your normal game. In fact, the game has no graphics whatsoever. It is an audio-game. You play a blind monster in a cave, and new prey is dropped into your cave. Using only sounds, you must find these people and eat them. You hear them breathing, running away, all through your surround sound system. The controller vibrated to their heart beat too. It's certainly something you've never played before.

SMASHELL

Creator: Antab
Genre: Platformer
Price: 400 Points

Trial Play: Plug yourself into an arena and begin to jump on top of enemy heads. This is one of the better looking XNA games on the marketplace, but I don't know how long it will last. You appear to be able to upgrade and see many different kinds of enemies, but you don't see a lot of that in the trial space.

BIOLOGY BATTLE

Creator: Novaleaf Software
Genre:Action & Adventure
Price: 800 Points

Trial Play: The most XBLA-like game on the service. Biology Battle pits you inside of a giant cell, battling the oncoming hordes of bacteria coming to kill you. It's got a whole lot of modes, and online leader boards through some tricky measures.

Funky Punch XL

Creator: SolusG
Genre: Fighting
Price: 400 Points

Trial Play: A 3D fighting game played on a 2D plane. You play as very simple characters, ranging from fireball throwing karate masters to cheerleaders. The game does support online play, which is great for such a game. It might be some fun for kids, but I can't see many people getting into it unfortunately.