Yes it is Call of Duty 4: Modern Warfare! Although the singleplayer is relatively short, the multiplayer is complex and fun! It has different ranks from lvl 1 or Private to lvl 55 or Commander. On the consoles, there is a priesteige mod where there are 10 extra ranks. There are at least two dozen perks that give you more advantages like the Steady Aim or Deeper Penetration. There are also challenges which you unlock as you gain rank, these keep you playing for a while. Most people are never satisfied until they complete them all. Besides that, it's just fun to play it. There are about 20 maps and they have given us 5. Snow Crash in the version 1.4 for PC which is like the Crash map except with a Christmas theme. When you call in airstrikes, you can here bells are you can also hear: "Ho, Ho, Ho!". In v1.6, we got Killhouse, Chinatown (based on CoD Carentan), Broadcast and Creek. Killhouse is based on the level "F.N.G." in the SAS training compound. Broadcast is based on the level "Charlie Don't Surf" in the TV station. Chinatown is for fun based on teh original Call of Duty map Carentan, this one is in San Francisco and against the Russians. Creek is based on the level where you have to hunt down Al-Asad. The singleplayer also has an originality. You can collect intel which look like laptops, they lead to cheat codes at the end of the game, they are disguised and hid throughout the game. Also, it's not like those World War II ones, where you win the war and come home with all your squad alright. Gaz dies, most of the marines were wiped out in teh nuclear blast. Griggs, the marine who made it out, died. Captain Price died, even though it looks like a Russian Medic was trying to revive him, with the cheat noclip, you can spectate the progress, but he quits shortly before the screen turns white. And after he hands you the gun, he dies, so it's hard to believe that after all that time past, he could still be revived. And after Soap is lifted up, the screen turns white, like Jackson's did when he died, so this might mean Soap died also. You did kill Al-Asad and teh Zakhaevs, so you did have an impact on the war. Also, there is a reporter at the end that gives information about leadership struggles (probabley about Zakhaevs death), nuclear missile tests and a lost Russian Cargo ship in teh Bering Sea (probabley the one that the SAS team raided). The entire war only took a week, but that was a big week.