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