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