Help me pick arcade games!!

ok so i can get 2 arcade games so help me pick, this is what i prefer...

1. It has to be a good game

2. Has to have achievments that are possible to get (easiest if possible)

3. I prefer action/shooter

4. I prefer xbox live multiplayer in it

1.Doom

2.Contra

3.TMNT 1989 Arcade

4.Assault Heroes

5.Heavy Weapon

6.Alien Homind

ok so i can get 2 arcade games so help me pick, this is what i prefer...

1. It has to be a good game

2. Has to have achievments that are possible to get (easiest if possible)

3. I prefer action/shooter

4. I prefer xbox live multiplayer in it

-PS360-

Castlevania is good and has pretty easy achievments. A lot of fighting, moves, and RPG elements. Well worth the price.

TMNT is cheap, short, has easy achievements, and fun to play online with up to four people. If you want onie is worth the price. 

Alien Hominid is very good but does not have multiplayer. Most of the achievments are easy to get. Well worth the price.

Assault Heroes is good but short and gets kind of repetitive, online isn't that great either. Heavy Weapon is like Assault Heroes but is longer but I think even more repetitive, online is better though.

I would say get Castlevania as your best SP game and then choose between TMNT for some co-op MP, Doom for FPS and co-op MP, or Alien Homind for some more good Single Player and alot of content.

castlevania symphony of the night and alien hominoid.

Sorry to point out the obvious!! But there are FREE trial versions of every arcade game on the marketplace for you to download. Try them then decide if you like it or not. It isn't rocket science.