Completed the 2nd floor in Zero Tolerance
Killed 25 enemies with the handgun on the last floor unlocked in Zero Tolerance
Killed 50 enemies with the handgun on the last floor unlocked in Zero Tolerance
Killed 100 enemies with the handgun on the last floor unlocked in Zero Tolerance
Killed 25 enemies with the shotgun on the last floor unlocked in Zero Tolerance
Killed 50 enemies with the shotgun on the last floor unlocked in Zero Tolerance
Killed 100 enemies with the shotgun on the last floor unlocked in Zero Tolerance
Killed 25 enemies with the flamethrower on the last floor unlocked in Zero Tolerance
Killed 50 enemies with the flamethrower on the last floor unlocked in Zero Tolerance
Killed 100 enemies with the flamethrower on the last floor unlocked in Zero Tolerance
Completed a level only using the handgun in Zero Tolerance
Completed the 3rd floor in Zero Tolerance
Completed a level only using the shotgun in Zero Tolerance
Completed a level without clearing the floor in Zero Tolerance Underground
Completed the First Floor in Zero Tolerance
Completed the 4th floor in Zero Tolerance
Killed 10 enemies consecutive with the punch on the last floor unlocked in Zero Tolerance
Had a shotgun filled with ammo in Zero Tolerance
Completed a floor without losing any soldier in Zero Tolerance
Passed the level with at least 90 health points in Zero Tolerance Underground
Passed a level with less than 30 health points in Zero Tolerance Underground
Completed a floor without getting a medkit in Zero Tolerance