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