Crysis isnt a good game for multiplayer...even Crysis 2.


As someone said before

Team fortress 2 is a good option
Battlefield: Bad Company 2
Quake Live(Free)
Alliance Valiant Arms(Free)
Genesis A.D(Free)

You should stick with this list...but if you are looking more:

Some old FPS Shooters awesome:

Gunz
Wolfenstein: Enemy Territory
S4 League.

Those are just common games B2P or free no MMO

Some FPS MMO like are

Planetside
Neocron
Face of Mankind
Global Agenda
Fallen Earth
Earthrise
APB: Reloaded
Crimecraft
World War II Online: Battleground Europe

And still you can play a lot of cooperative games like Left 4 Dead =)