Gears of war 2 has amazing graphics, gameplay and the new weapons are fantastic. The ability to crawl when you've been downed is also great! The storyline is also fantastic and is left opened very well for a seqel, with many unanswered questions ;)
Single player is longer than the first one and i loved every minute of it. It's easy to get hooked and want to get all the collectibles and all of the acheivements.
Now comes the online play.....
I always say why fix what isn't broken? The gears of war mutliplayer in the first one was amazing.....you could play exactly what you wanted, how you wanted and with who you wanted....
Gears of war 2 multiplayer was a huge let down for me and here are the reasons why:
-You cannot choose whether you are cog or locust
-There is no multiplayer leaderboard
-You do not get to choose what match type you want to be in, whether it is execution, warzone etc
-You cannot choose the round duration of the public matches
-Seriously 2.0 (100,000 kills) requires no skill whatsoever as you dont have to get the kills online.....you can get them all in single player replaying the same chapters that give you the same kills over and over.
My recommendation is to buy it for the single-player alone....and also horde mode is cool! But if you're expecting gears 2 to be as good as the first one online, prepare to be shocked.....and by that i mean with the smoke grenades that happen to act as flashbangs in this one too =(