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