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