Just COD4. I never played it... and I figured 2 was too many. So I wanted to keep the PS3 one and dumped the XB360 one.
Don't worry... not abandoning the XB360. Just picked up Vegas 2 for it
I just dont play COD4 enough to warranty owning a copy for both. Plus Gamestop gave me almost 40 bucks for mine with 20% trade in bonus for reserving R6V2 and 10% for being an Edge member.