Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Hasty Escape	Finish the game in Normal Mode in under 45 minutes.
An Easy Escape	Finish the game on Easy Mode.
Artificial Enhancement	Find all the health upgrades.
Deep Dweller	Defeat the rock creature in the caverns.
Escape from Tethys	Finish the game on Normal Mode.
Final Encounter	Defeat the IRI Assassin for the last time.
Haywire	Destroy the missile frigate.
Hostile Waters	Destroy the reef guardians.
Industrial Sabotage	Encounter the IRI Assassin.
Locked and Loaded	Find all the ammo upgrades.
Mysterious Planet	Unlock the high-security gate.
Rogue Scientist	Put the rogue scientist to rest.
Tech Expert	Find every upgrade.
Tethys Explorer	Explore every area on Tethys.
We Meet Again	Defeat the IRI Assassin for the second time.