i bought my crysis2 at target...how do I add it steam so I can invite people to games and such...
i tried entering my serial number and it didn't work...

If you bought Crysis from EA or bought it from a traditional Retailer...the only way u can tie up with your Steam account is by using the "add a non steam steam to my library" under the game tab....which i currently am doing

I tried browsing for the game when I was trying to add it...but I couldn't find the game. I figure it had to be downloaded to my computer, cuz it's a cd...

If it helps the game launcher is here:
[Your location]/Crysis 2/bin32/crysis2.exe/

If you're using Windows 7, someimes games get buried, but you can add it from C:/User/Games, I think.

Great thanks!