Altough Valve released Left 4 Dead's sequel relatively early to some expectations, Left 4 Dead 2 seems to suffer no illness, and more so, even though it might not bring anything new to the scene, it's thee best -zombie shooter- out there. Its smooth edges compensate for its lack of originality.
Left 4 Dead 2 has five full and more interesting campaigns, a more fleshed out and distinctive setting with some fantastic action set pieces, more personality, more modes, and in general gives you more to do.
If you're new to the zombie apocalypse, you're one of four survivors that has to plaw through zombies to get to the end of a map, set in the American southeast.
The AI is interesting, setting different chalages as every stage does not have the same ending due to its "Director". Zombies w
ill randomly spawn at times so, as team mates, you need to cover each other's backs. Communication is key!
I don't suggest going through the game at a higher difficulty above normal, since only the most experienced will manage in Left 4 Dead 2's survival-style approach. Depening on the type of player you are, the success rate of your mission will fluctuate. Don't be the "hero" or the "silent" type, since team-work is required in Left 4 Dead 2, where the fait of your team might be decided by your next actions. Being selfless can do you more good, than harm, most of the time.
However, what happens when a team-mate suddenly just quits or gets disconneted? Don't despair, for Left 4 Dead 2's artificial inteligence, picks off where your team-mate left. And to be honest, the bots are quite good! Sure, they might not be as fun as your buddy shouting to where ammo is or pointing out the obvious on the battle field, but the bots do their job clean and efficient.
You'll also get a kick out of Versus mode, as apart from Survival, you'll face off the Tanks, Boomers, Smokers, and Hunters from the first game, in addition to the new Spitters, Jockeys, and Chargers. The new boss zombie special powers add layers to the gameplay, such as the Spitter's acid pool that can do heavy damage over time to anyone who stumbles into it.
The Jockey's ability to take over control of a Survivor's direction of movement makes for even more interesting combination possibilities here, and overall the addition of these new boss zombies adds in a welcome amount of depth and, if you're playing as Survivors, unpredictability to the play experience.
Over-all, the game delivers. It's not a shallow re-make that picks up bits off of the bits of success left behind by it's predecessor, but a smoother, more refined version of the first game itself and if that was the aim, than mission accomplished Left 4 Dead 2!