Here is the full list of all 85 Slime-san achievements.
Beat all levels in World 5.
Beat all levels in the game.
Collect all the Apples in World 5.
Buy all Playstyles.
Unlock all arcade games!
Beat all levels in World 4.
Collect all the Apples in World 4.
Collect all the Apples in World 3.
Beat all levels in World 3.
Collect all the Apples in the game.
Buy all pieces of clothing.
Beat all levels in World 2.
Collect all the Apples in World 2.
Buy all shaders.
Beat all target mode challenges.
Find grandpa-san in Slime town.
Unlock and beat level 101.
Beat one target mode challenge.
Unlock one arcade game!
Collect all the Apples in World 1.
Buy one Playstyle.
Buy one shader.
Watch one cutscene in the settings.
Listen to one track on any jukebox.
Look at one international leaderboard!
Buy one piece of clothing.
Buy all pieces of sideart.
Beat all levels in World 1.
Buy one piece of sideart.
Talk to five citizens in Slumptown.
Beat all the Trophy times in World 1.
Beat all New Game PLUS levels in World 1.
Beat all normal and NG+ levels, collect all the Apples and beat all the Trophy times in World 1.
Beat all the Trophy times in World 2.
Beat all New Game PLUS levels in World 2.
Beat all normal and NG+ levels, collect all the Apples and beat all the Trophy times in World 2.
Beat all the Trophy times in World 3.
Beat all New Game PLUS levels in World 3.
Beat all normal and NG+ levels, collect all the Apples and beat all the Trophy times in World 3.
Beat all the Trophy times in World 4.
Beat all New Game PLUS levels in World 4.
Beat all normal and NG+ levels, collect all the Apples and beat all the Trophy times in World 4.
Beat all the Trophy times in World 5.
Beat all New Game PLUS levels in World 5.
Beat all normal and NG+ levels, collect all the Apples and beat all the Trophy times in World 5.
Beat all the Trophy times in the game.
Beat all New Game PLUS levels in the game.
Beat all normal and NG+ levels, collect all the Apples and beat all the Trophy times in the game.
Beat the trophy time of level 101.
Unlock and beat New Game PLUS level 101.
Beat a Speed Running Mode!
Beat a Boss Rush Mode!
Beat all the achievements in Slime-san!
Beat levels 1 to 5.
Beat levels 1 to 5 in NG+.
Beat levels 6 to 10.
Beat levels 6 to 10 in NG+.
Beat levels 11 to 15.
Beat levels 11 to 15 in NG+.
Beat levels 16 to 20.
Beat levels 16 to 20 in NG+.
Beat levels 21 to 25.
Beat levels 21 to 25 in NG+.
Beat level 26.
Beat level 26 in NG+.
Beat the scary dojo challenges 1 to 5.
Beat the scary dojo challenges 1 to 10.
Buy 10 items in the carpenter shop.
Buy out the entire carpenter shop.
Speedrun the entire 25 levels once!
Go through the tutorial levels once.
Beat all core sheeple levels.
Beat all core sheeple level trophy times.
Collect all bugs in core sheeple levels.
Beat all core sheeple levels in NG+.
Beat all remix levels.
Beat all remix level trophy times.
Beat the special sheeple level.
Beat the special sheeple level in NG+.
Talk to both hidden indie stars.
Get a high score in all 5 music game tracks.
Purchase half of the gallery.
Purchase all gallery sets.
Complete a speedrun of Sheep's Sequel.
Get the high score in Sheepleman 64.