Successfully complete story mode to unlock the bonus "Infinity" level, with randomly generated floors.
Defeat the Infinity level 50 Boss.
Defeat Colossus (Sector 2 Base Boss).
Defeat Enforcer (Sector 2 City Boss).
Defeat the Infinity level 30 Boss.
Defeat the Infinity level 10 Boss.
Defeat the Infinity level 40 Boss.
Defeat the Infinity level 60 Boss.
Defeat the Infinity level 20 Boss.
Start to reload then switch to a different weapon. Switch back and your weapon will be reloaded about three
When Enforcer puts up his big shield and starts advancing down the field, go through it. Get behind and follow
him. Take out your Judgment or Trident (make sure it is upgraded to at least level 3) and shoot the yellow
circle on his back. Use the quick reload tactic and he should go down very easily.
Upgrade your Vulcan to its highest level and stock up on ammunition. Throw a few honeypots to lure Mantis into
one spot so that he will not attack then unload on him. This brings his health down drastically.
For the three Bosses in Sector 2, their weak spots are as follows.
Enforcer (City Boss): On the machine's back near the bottom, is a circular lighted area. Your crosshairs will
lock on to that area. Shoot it with a shotgun or rocket launcher for best results.
Colossus (Base Boss): Climb the stairs until at the very top and look down at Colossus's head. When the head
opens, shoot it with a shotgun for best results (1/5 to 1/4 damage).
Mantis (Ruins Boss): Get close to the bug and shoot the underside. Shooting its shell will not do anything,
as it deflects most of the shots. The best weapon is the Photon MG because it stops Mantis in its tracks.