Full list of all 44 High On Life achievements worth 1,195 gamerscore. It takes around 20-25 hours to unlock all of the achievements in the base game.
The base game contains 32 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 12 achievements worth 195 Gamerscore.
Sit through the entirety of the really annoying countdown show on TV.
Unlock every post in the Bounty Hunter forums.
Watch Globo's rise to fame.
Collect every trading card in the game.
Find and open every Luglox chest.
Unlock and explore every collectible warp base.
Discover Dr. Gurgula's hideout in the Human Haven.
Complete the game with Stan's product in your inventory.
Sacrifice a Gatlian other than Kenny during the fight against Garmantuous.
Defeat Garmantuous and take down the G3 cartel.
Say goodbye to Suit-O.
Obtain Lezduit.
Discover the movie theater.
Defeat Nipulon.
Spend 15 hours at the very real in-game alien strip club.
Pay your bill at Applebee's.
Defeat Dr. Giblets.
Obtain the Mag-Boots.
Defeat the Skrendel Brothers.
Obtain Creature.
Pop 20 Grunt eyeballs.
Obtain the Jetpack.
Obtain Gus.
Defeat Krubis.
Use Sweezy to boss around the Office Moplets.
Obtain Sweezy.
Defeat Douglas.
Take Knifey's advice and stab Gene in the gut.
Defeat 9-Torg.
Get Knifey.
Juggle an enemy in the air with at least 5 shots.
Kill Slumsley.
Collect all 9 trading cards on Peroxis and Muxxalon.
Defeat Mux.
Kill a Bloat with Knifey's new upgrade.
Take a bath with Toxxo.
Find a way to make love to the Parasite Passenger.
Visit Cheeks and hang out until closing time.
Visit every major Peroxian landmark (and report back to the tour guide!)
Find every scattered Muxxalon package.
Kill 100 enemies with a fully charged ball shot.
Become the Riddle Master.
Kill 50 enemies with Harpers glob shot.
Grant the dying wish of a sick slug.