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