- How many Escape From Tethys achievements are there?
There are 15 achievements to unlock in Escape From Tethys worth a total of 1000 gamerscore.
Escape From Tethys Achievements
There are 15 achievements with a total of 1000 points
Encounter the IRI Assassin.
Defeat the rock creature in the caverns.
Put the rogue scientist to rest.
Destroy the reef guardians.
Defeat the IRI Assassin for the second time.
Destroy the missile frigate.
Defeat the IRI Assassin for the last time.
Finish the game on Easy Mode.
Finish the game on Normal Mode.
Finish the game in under 90 minutes.
Find all the ammo upgrades.
Find all the health upgrades.
Find every upgrade.
Explore every area on Tethys.
Unlock the high-security gate.