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.
Killed an enemy under the effects of 4 science weapons.
Skipped the Hope into the sun.
Saved Edgewater permanently.
Succeeded at 3 dialog conversation checks with a single disguise.
Completed all companion quests.
Killed an enemy that was hit with all 5 damage types.
Killed 20 enemies that were infected by spreading N-rays.
Brokered peace between the Iconoclasts and MSI.
Used the medical inhaler 300 times.
Killed 50 enemies with sneak attacks.
Killed 50 enemies with companion abilities.
Killed an enemy with a science weapon sneak attack during TTD, with a weakspot critical hit.
Killed 50 enemies with a tossball stick or tossball blocker.
Completed The Outer Worlds on any difficulty.
Completed The Outer Worlds on hard difficulty.
Completed The Outer Worlds on supernova difficulty.
Landed on Tartarus.
Skipped the Hope.
Brought robo-destruction to Edgewater.
Character level 30 reached.
Learned the shocking truth about the colony.
Won the battle of Stellar Bay.
Simultaneously had bonuses for meat, carbohydrates, sugary drink, caffeine, and alcohol.
Completed the SubLight quest lines.
Wore 'A Nice Hat' and 'Chimaera' at the same time.
Hit 30 enemies in the groin during tactical time dilation.
Starred in an Odeon Pictures movie.
Dealt with the cartographer.
Landed in Byzantium.
Finished a companion's quest line.
Turned 100 enemies to ash with plasma damage.
Stopped the Monarch broadcasts.
Had 75% or higher negative reputation with 3 factions.
Recruited all of the companions.
Had 75% or higher positive reputation with 3 factions.
Acquired 3 flaws.
Reached Stellar Bay.
Saved the universe's greatest diet toothpaste recipe.
Used dialog skills 30 times in conversations.
Sold 10,000 bits worth of items to vendors.
Improved your gear 30 times through tinkering and mods.
Killed 30 automechanicals with shock damage.
Raised a skill to 100.
Got your very own ship.
Simultaneously equipped Spacer's Choice brand clothing, headgear, and 4 weapons.
Killed a mega creature.
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.