By that logic, Call of Duty 4 was based off of the Battlefield 2 system because it integrated dynamic spawns (i.e., Squad Leader), weapon unlocks (i.e., Battlefield), class abilities (i.e., Engineer Loadout = RPGx2, etc.), a Ranking System, etc....
Keep in mind: Everything is a rip-off of Doom and Wolfenstein at this point.
Don't forget Quake 1 and 2! :p
Crysis 2 is the biggest rip off out of any of these, open yur tunnel eyes you fanboys/!
How is Crysis 2 the biggest? Is your reasoning that it's the last down the line? What about World at War; wasn't that a big rip-off of Call of Duty 4? Isn't every lasst CoD game released just a big rip-off of the original Call of Cuty?
What about Homefront? Or Medal of Honor (online)? Or Breach? Or Shadowrun? Or NFS: Shift?
Every game has either been incredibly inspired by or ripped off another game; it's been that way for the last decade. Games copying another games commercial success is nothing new, but at least Crysis attempts to dissociate from the pack.
Arguing who the biggest rip-off is, is like arguing who the fattest guy at the World Obesity Championship is. We can all agree that they started copying the eating habits of Doom and drizzled the success with too much mayonaies.