Here is the full list of all 14 Supaplex achievements.
Complete all levels.
Complete 100 levels.
Complete the last level.
Complete 80 levels.
Complete 60 levels.
"Eat away" 50 tiles whith bugs.
Complete all 5 training levels.
"Eat away" the bug.
Complete 40 levels.
Go through 100 ports.
Complete 20 levels.
"Eat away" activate the terminal.
"Eat away" 50 infotrons.
Move 100 zonks.