Borderlands – What does “burst fire count” mean

In my experience, rocket launchers are WILDLY underpowered, which means you're better off staying away from them. Brick's berserk mode can be absolutely amazing when you level it up correctly. I'd recommend working down the Brawler and Tank trees almost evenly; the final skills in both trees aren't that amazing, but still good. There are also some good skills in the Blaster tree, as long as you stay away from things that boost rockets only; shotguns and machine guns are your friends.

Here is an example of a Centurion build:

http://www.borderlandsthegame.com/skilltree/brick/#31555505555510550000000

You could pretty easily argue points around a bit depending on your play style, but if you like berserking, you'll have fun with this one.

You can only get experience for a mission once per playthrough. If you completed the mission by yourself and then replayed it in co-op, you would not get the experience a second time. If you complete a mission in co-op, it will count towards your single player game for all players involved, if they have not already completed it.

It is also possible that you are not eligible for the mission, which means you have not completed the prior main story-line missions and are not far enough ahead in the game to get that mission by yourself. You will not get the rewards when another player turns it in. If this is the case, it will say so next to the missions and will not track progress for the mission.