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