How do you get 2 player in dead rising 2

It's easy. All you have to do is the following.

1. If using a DLC pack, make sure the other person has the same pack or support pack.

2. Send a game invite or have the other person join session in progress.

3.Have fun and if you are using Gamebreaker, you better go to Sandbox mode where it dosen't matter if you dont save.