Modern Warfare and Left 4 Dead?  If you are then you should download Alliance of Valiant  (A.V.A).  It's a really fun game that's free.  It has really good graphics and weapons to choose from.  You can customize them too.  If you don't like zombies then you don't have to play "Survival" or the newly added "Escape" mode where you have 2 find the exit with 3 other people and escape to the helicopter fighting off zombies!  :)    Here's the link:  
  
http://ava.ijji.com/

I have Burn Zombie Burn, Linger in the Shadows, Fists of Plastic, and Pain.  What is better than those?

My psn is mike1146l   
If u have madden 10, ncaa football 10, bf bc, or medal of honor airborne or bf 1943 be sure to add me!