Don't waste your time with the single player campain, multiplayer is where all the fun is at.
Chose your soldiers face, country of origin, make up a name, and you are ready to go. The single player in DF2 is bad, the missions are boring and lame. The enemy AI is horrible, they just stand there and don't really move much. There is alot of glitching when you go up ladders and run up stairs. It just plan sucks, don't waste you time playing it. The multiplayer is what this game is all about. There is deathmatch, team deathmatch, king of the hill, assult and defend, and my favorite, capture the flag. Novalogic was nice enough to put a custom map editor in with the game so you can make your own maps or there are fan sites with tons of pre made maps. I almost never played in the same map twice unless I was hosting a game. There are that many maps out there, and some of them are really good. That's one thing that makes the multiplayer so great, it always feels new. Your not stuck with the same 12-15 pre-made maps that are in the game. The maps are huge, you could be running around the battlefield and get killed by a sniper 1000 meters away from you. And it only takes a few shots to get killed in DF2.
The graphics arn't great, the building look bland. Your gun will glitch and blink. The enemy soldiers have some detail but animate very bad. If you like things looking nice and pretty you won't be impressed by this game. But one thing about the graphics being bad is that the tall grass or weeds is nice and thick for snipers to hide in. The sound isn't that great, the guns sound a little weird and the explosions sound weak.
This game is about the multiplayer, don't even waste your time with single player. If you can look past the poor graphics, sound, and just about everything else you can enjoy this game.