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