Me and my friend are trying to play portal 2 co-op online but it’s not letting us join...

If you want you can add me! I also have a few co-op games myself we can try and play. I am mostly currently looking for a Borderlands or Portal 2 co-op right now. I really want Portal 2 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

Hello Sam, this is Manuela. I'm an Independent Advisor and community user like you, ready to assist with this.

Not a Microsoft employee.

I'm sorry to hear you're having some trouble when trying to play Portal 2 with your friend. Let's try to sort this out.

However, before that, I would like to ask the following questions:

What's the error you and your friend see when trying to play together?

Is this occurring with more games, or is just Portal 2?

Are you and your friend subscribed to Xbox Live Gold or Game Pass Ultimate?

What procedures you and your friend tried to fix this inconvenience prior to your post creation?

Additionally, I appreciate it if you and your friend verify the NAT type for each one by opening Settings > Network config.

What's the NAT type you and they see?

Hey ,

You got Farcry 3 and Portal 2 ! Send me a message if you're interested in playing Co-Op missions , ( i'm a Huge Co-op fan ! )

and I'd like to play MW3 Special Ops

I've done GoW1+2 on co-op, they were pretty good.

However, the best co-op I've played is Portal 2. It's just brilliant.