Score 25,000 points in the Capitol City Mall level in Kaos mode to unlock the Chinatown level.
|Corporation Central Level|
Score 100,000 points in the East Side level in Kaos mode to unlock the Corporation Central level.
|Defeating ATO Guards|
While in Revolution mode, drop your weapon before moving past an ATO guard. They will ignore you if you are not causing problems and have no weapon. You can usually find another weapon replacement later.
Use any and all explosives to your advantage. Rocket launchers, grenade launchers, and even molotov cocktails can be used to blow up buildings. When throwing an item into a building, face a window directly and it will go right in. Destroying buildings is where the big money is at.
To disable bombers, set them on fire with the flamethrower. They will die without exploding.
|East Side Level|
Score 50,000 points in the Chinatown level in Kaos mode to unlock the East Side level.
Find an area in any level where you can run back and forth reasonably far and has weapons power-ups on either side. Draw a large crowd of enemies between this area and simply proceed to run back and forth. When you are ready to let loose, turn around and begin to strafe. Run to the other side as you pick up all the diseased ones' health and time bonuses. When you reach the other side, take your new weapon and start again.
|Infinite Kaos Mode Time|
Successfully complete all Kaos levels in arcade mode.
|Last Clone Standing Levels|
Successfully complete the three minute and five minute versions of a level to unlock the Last Clone Standing version of that map in Kaos mode.
|Play As Bull|
Successfully complete the East Side level in Revolution mode to unlock Bull in Kaos mode.
|Play As Freak|
Successfully complete the Chinatown level in Revolution mode to unlock Freak in Kaos mode.
|Play As Spanky|
Successfully complete the Mall level in Revolution mode to unlock Spanky in Kaos mode.