1. Start a new game.

2. Go to the top-right, and click "Single Player".

3. Click any number of maximum players you'll need. Setting it higher then how many people will be playing won't do anything bad.

4. Check "Peer-To-Peer" if it isn't checked already.

5. Change limits. You can decide if people spawn with weapons, how many things they can spawn, etc. here.

6. Click "Start Game", and the map you selected will load.

7. Now you're in-game. Time for Part 2!

1. Open the overlay by holding SHIFT and hitting TAB.

2. Click "View all friends" at the middle-left.

3. Right-click the friend you want to invite, and click "Invite to Game".

4. Have your friend open their overlay and click the invite.

5. They should start joining and you'll be able to play together!

Thanks for reading this guide, I hope it helps!