Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Alien Commander	Defeat Alien Commander.
Alpha Twin	Defeat Alpha Twin.
Bad Ending	Finish the game.
Forbidden Temple	Reach the forbidden Temple.
Level Up	Level up at least once.
New Game Plus	Finish the game in New Game Plus.
Prisoner One	Defeat Prisoner One.
Temple Sentinel	Defeat Temple Sentinel.
Ultimate Challenge	Complete the ultimate challenge.