Full list of all 68 The Outer Worlds achievements worth 1,390 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game.
The base game contains 48 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 20 achievements worth 390 Gamerscore.
Used the medical inhaler 300 times.
Skipped the Hope into the sun.
Saved Edgewater permanently.
Had 75% or higher negative reputation with 3 factions.
Turned 100 enemies to ash with plasma damage.
Completed The Outer Worlds on supernova difficulty.
Completed The Outer Worlds on hard difficulty.
Brought robo-destruction to Edgewater.
Won the battle of Stellar Bay.
Killed 50 enemies with companion abilities.
Dealt with the cartographer.
Saved the universe's greatest diet toothpaste recipe.
Completed The Outer Worlds on any difficulty.
Landed on Tartarus.
Completed the SubLight quest lines.
Character level 30 reached.
Killed an enemy under the effects of 4 science weapons.
Killed an enemy that was hit with all 5 damage types.
Killed an enemy with a science weapon sneak attack during TTD, with a weakspot critical hit.
Wore 'A Nice Hat' and 'Chimaera' at the same time.
Acquired 3 flaws.
Starred in an Odeon Pictures movie.
Completed all companion quests.
Skipped the Hope.
Learned the shocking truth about the colony.
Raised a skill to 100.
Simultaneously equipped Spacer's Choice brand clothing, headgear, and 4 weapons.
Landed in Byzantium.
Finished a companion's quest line.
Killed 30 automechanicals with shock damage.
Brokered peace between the Iconoclasts and MSI.
Stopped the Monarch broadcasts.
Killed 20 enemies that were infected by spreading N-rays.
Hit 30 enemies in the groin during tactical time dilation.
Killed 50 enemies with a tossball stick or tossball blocker.
Killed 50 enemies with sneak attacks.
Improved your gear 30 times through tinkering and mods.
Sold 10,000 bits worth of items to vendors.
Recruited all of the companions.
Reached Stellar Bay.
Killed a mega creature.
Simultaneously had bonuses for meat, carbohydrates, sugary drink, caffeine, and alcohol.
Succeeded at 3 dialog conversation checks with a single disguise.
Had 75% or higher positive reputation with 3 factions.
Used dialog skills 30 times in conversations.
Got your very own ship.
Recruited a companion.
Landed in Emerald Vale.
Achieved a compromise between Olivia and Minnie.
Delivered the journal to Lucien.
Completed Peril on Gorgon on any difficulty.
Powered the reactor.
Destroyed the Synthesizer.
Found Olivia Ambrose's journal.
Found 20 Portable Phonographs.
Acquired Special Delivery, P.E.T., and Employee Benefits.
Found Lucky Montoya's body.
Listened to Lucky Montoya's message.
Complete Murder on Eridanos on any difficulty.
Kill the Slug Queen.
Choose to either infect or cure Eridanos.
Receive an invitation to Eridanos.
Use the Discrepancy Amplifier for the first time.
Investigate every suspect and report your findings to Administrator Ludovico.
Discover the biggest secret in the aetherwave industry.
Acquire Spectrum Gatling, The Needler, and Udder Buddy.
Kill 50 Infected Humans or Parasites.
Ask a companion to be the Bad Inspector.