Once complete the main game and defeat Ace in the arena, you will have to fight Exile. His skills are not that great, but his mobility will kill you. Get a heavy AC, go to the parking lot, and let him get right in your face. Then, use the flame thrower and big bazooka to attack. You will get 1,500,000 credits for defeating him. You will also gain access to the "Extra Arena" mode. In this mode, you and a teammate of your choosing can go up against two enemy Ravens at once.

In the "Parking Lot", as soon as the match begins, boost backwards (into the corner). On occasion the enemy will get caught-up on the wall and you will have up to a minute worth of free shots. Since the part of the wall covers the R arm weapon, there are only a couple of Arena opponents that this trick will not work on.

Buy and equip the machine gun with 1000 ammo (R arm weapon), and the hovering legs at the end of the list (it is a long shaft). Strafe around your opponent in the arena while firing the machine gun. This trick usually works up until rank A-3.