Here is the full list of all 36 A Buttload of Free Games achievements.
Play A Clownfetti Catastrophe.
Play Whodini.
Play Hungry Frog 2.
Play Geckles's Ghosts.
Play |\\/|0|\\|5+3|2.exe.
Play You Can't See Everything at Once+.
Play When Life Gives You Lemons.
Play Two Sides.
Play Tooting in the Rain.
Play Spicy Mansion.
Play The Scarlet Cypress Hotel.
Play The Flame.
Play Super Slime Slasher Ultra.
Play Sqaranch!
Play SOUP.
Play Scream Sport.
Play Rootin' Tootin' & No Shootin'.
Play Rogue_Paint.
Play Real-Time Gardener.
Play Procrabstination.
Play Plünge.
Play Place Place.
Play Miracle Cure.
Play Intergalactic Interpreter.
Play Hunk Hustler.
Play FEED ME APPLE.
Play FPS TRUE LOVE.
Play FataliTea.
Play Fancy Trash.
Play Falling in Love.
Play Do the Business.
Play Demons.
Play Bird Bakery.
Play Dark Roads.
Play Ben VS Anime.
Play 10 Second Painter.