Complete the following levels in each difficulty setting in the following time limit to open up extra options:

Tomb:
Easy - 1 minute - Paintball Mode
Norm - 3m 10s - Priestess Character
Hard - 6m - Teeth Mummy Character

Chinese:
Easy - 1m 15s - Chinese Waiter Character
Norm - 3m - Weird Gun Sounds Mode
Hard - 6m - Mr Big Character

Cyberden:
Easy - 50s - Siamese Cyborg Character
Norm - 1m 30s - Tuxedo Cyborg Character
Hard - 3m - Enemy Rockets Mode

Village:
Easy - 30s - All Heads Detachable Mode
Norm - 1m 30s - Hick Hyde Character
Hard - 4m - Insect Mutant Character

Chemical Plant:
Easy - 30s - Male/Female SWAT Characters
Norm - 1m 10s - Infinte Ammo Mode
Hard - 6m - Malehood Character

Planet X:
Easy - 55s - Green Alien Character
Norm - 1m 30s - Float Alien Character
Hard - 3m - No Heads Mode

Mansion:
Easy - 1m 45s - Big Head Mode
Norm - 5m - ?
Hard - 10m - Girl Zombie Character

Docks:
Easy - 1m 15s - Male/Female Soldier Charaters
Norm - 1m 30s - Big Hands Mode
Hard - 2m - Shock Trooper Character

Spaceways:
Easy - 1m 10s - Red Alien Character
Norm - 1m 20s - Female Alien Character
Hard - 2m - Small Heads Mode