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