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