Summary: I bought this game purely for the multiplayer. I have played many CoD games and I am familiar with cheaters. MW3 is absolutely plagued with cheaters. The obvious aimbotters but also wallhacks, spectator hacks and more! If you want a good multiplayer FPS I'd recommend steering clear of this game. The cheating is rampant.
Summary: i was excited to play the new mw3 but i left feeling disappointed and i really wish i could get my money back. i really don't mind how it's similar to mw2. the campaign wasn't too bad, but it got pretty linear as you continued, but as you know most people don't play it for the campaign. sadly though, the multiplayer is a lot worse than the campaign.
Summary: Same game-matching as MW2, same garbage. Cheaters galore. Why won't Steam/Activision stop them? Every other game I join is ruined by cheaters. They like to call themselves "hackers," like they have done something clever. But they are just cheats. Once they enter a game, the game is over, all opponents will die quickly, all the killstreaks will be called in. So why play? I'm sorry I bought this otherwise good game. Activision, you made a billion dollars selling this game.
Summary: In my short playtime, I witnessed enough hacking to make me think I was playing Combat Arms. The kill cams, snapping to heads, etc. It's just terrible. Whenever someone cries "HACKER," I usually laugh and tell them to get better. But this is much different. The PC version of MW3 is ridiculously easy to hack, and the aimbots and stats hacks are overflowing from the internet. This is unacceptable for a title of this weight to have so many issues with hackers.
Summary: This game has no, and I mean NO changes from Modern warfare 2. I wouldn't recommend it to anyone besides people who enjoy playing these games all day long. There's no new innovations, just a few new guns, and the walking glitches are still there. Honestly, if I had paid full price for this game I would be terribly angry with myself.