Escape From Tethys Achievements Here is the full list of all 15 Escape From Tethys achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc Flag Filter All None 15 Offline Mode 15 Single Player 9 Main Storyline 1 Difficulty Specific 2 Stackable 4 Collectable 1 Time/Date Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply Industrial SabotageEncounter the IRI Assassin. Deep DwellerDefeat the rock creature in the caverns. Rogue ScientistPut the rogue scientist to rest. Hostile WatersDestroy the reef guardians. We Meet AgainDefeat the IRI Assassin for the second time. HaywireDestroy the missile frigate. Final EncounterDefeat the IRI Assassin for the last time. An Easy EscapeFinish the game on Easy Mode. Escape from TethysFinish the game on Normal Mode. A Hasty EscapeFinish the game in Normal Mode in under 45 minutes. Locked and LoadedFind all the ammo upgrades. Artificial EnhancementFind all the health upgrades. Tech ExpertFind every upgrade. Tethys ExplorerExplore every area on Tethys. Mysterious PlanetUnlock the high-security gate.