Use two controllers or a friend online
Map any (I used subway)
Weapon Rocket Launcher and Katana only
Score limit 5000
Start the game and wait for the weapons to appear. Once they appear pick up a Katana with your player, and the other pick up a rocket launcher.
Attack the second player with the Katana to take them to low health, then stand back and face each other.
Shoot a rocket at your player, then press
to hit the rocket back and kill the other player.