Complete the indicated task to unlock the achievement.

Achievement	How to unlock
42	Die exactly 42 times during the whole game.
Armour Clad	Absorb 1000 bullets with your shield.
Explorer	Find the hidden levels.
Flamer	Be careful when playing with fire.
Hero	Finish a level with one life.
Master of the Universe	Defeat Nestor in less than 3 minutes.
Pacifist	Kill no enemies except bosses.
Rambo	Own 4 fully upgraded weapons.
Space Ninja	Defeat the malfunctioning Space Machine.
Spartan	Defeat Nestor without using the Megablast weapon.
Zero	Take no hits on any level.