This game is certainly fun, the music is fantastic (better than 2's?) and the level design is nothing short of genius (if you loved Portal, you'll love Galaxy Man's stage).
But the difficulty. Oh, Karzahni, the difficulty.
It's not just that the levels are hard. (They are.) It's not that the time trials are hard. (They are.)
The achievments are INSANITY.
Beat each boss in 10 seconds?
Don't take any damage in the whole game?
Don't kill any enemies?
Jump as little as possible?
Beat each boss with 1 pixel of health left?
Beat the game 3 times in one day, and once per day for 3 days?
Don't use E-tanks?
Don't fall into any pits?
Hoo, this game will keep me busy for quite a while. *plays*
Okay, it's late, but I'm having so much fun with this game!
(When I first booted it up, it told me my graphics card was outdated... that was quickly fixed though)
Anyway, very very fun. The gameplay is very simple, but complex at the same time. Everybody has a primary weapon, secondary weapon and melee weapon.
There are 9 classes that can be changed at any time (although you'll die unless you're at the spawn point).
The Scout is very fast, but weak. The Soldier is the one I tend to use the most. Their rocket launcher can be used for assisted jumps. The Pyro seems to be a very easy to use (and annoying) one, with a Fire and Forget Flamethrower. The Engineer is very fun as well. Placing sentry guns in hotspots can rack up kills very quickly. Demomen have a grenade launcher and sticky-bombs which makes them very annoying. Heavies are also fun, as they have tons of health and a huge machine gun. Medics are in very high demand due to their healing-gun and ability to make anyone temporarily invincible. Spies are fun to play as and hard to master... the ability to disguise as the other team and stab them in the back (literaly) is very cruel. Of course... people have their methods of easily seeng through a disguise.... *glares at Pyro.* I haven't tried Sniper yet.
The maps are well designed, with a variety of game modes. (No deathmatch. Sorry.)
The game is fast paced, and you'll find yourself dying a LOT... but that's okay. Despite that, the game is very newbie friendly.
Oh, and it's very, very funny and has a unique art style.
I reccomend Team Fortress 2 for anyone looking for a good multiplayer game.