Need players for Co-Op achievements

think some of you are misunderstanding the achievement. The reason it's called "Professor Portal" is because you, the professor, are teaching the noob. That means getting this requirement requires three people:

Player 1: You, who are getting the achievement. You play the entire co-op game with Player 2: Your friend who plays the entire game co-op with you.

Player 3: Your friend who did not play the game co-op until you were finished. The day you're done, you ask that Player 3 to join your co-op game. You host a match on the calibration course, and when you're done, the Professor portal achievement pops.

So for this achievement, you need help from 2 others, and one of them has to be patient enough that they'll wait for you to finish co-op before THEY start co-op.

There may be a

Some of it is two player co op but some of it can have up to four players. Halo CEA is only two player co op but Halo 3 is four player co op. Not sure about the others. There is an achievement that requires four controllers.

Playing nearly every day and looking for additionel players for Vidmaster 4-player co-op challenges. I only need two achievements for this game.

Yeah same. I've already beaten this game numerous times. Just need some co-op achievements. I'ma mellow player too

I need that 4 player co-op for raams shadow. And many of the horde achievements as well. Trying to get back into the swing of things for Judgement.