Instructions
Select "Multiplayer" on the game's title screen.
Select "Find Match" on the Xbox Live screen.
Choose host a one-on-one "3rd Person Cage Match."
Find a friend who can join your game. If you are doing this without someone you know or have played with before, be sure to ask them if they would like to boost. Typically, users join the match on their own or via the "Auto-match" feature that automatically puts them in an open game.
Select the map. Which map you choose does not matter, but smaller ones will enable you to find one another quicker.
Select your class and weapons. When you are starting out you will have a smaller selection, but as your experience grows you will have more weapons to choose from.
Meet up at the center of the map and drop the "Tactical Insertion" item. The item allows you to spawn right at that spot so that once you die you will be able to appear right where you were killed.
Get killed by your opponent.
Take turns repeating Steps 7 and 8. Games end at 20 kills which means that you and your opponent must trade off who gets the winning kill. Your experience points will rank up very quickly.