Swamp Monster is a fan made antagonist in Abandoned: Discovery Island.
He appears to be a big, green monster covered in vines and seaweed. He has no face, but red pupal's.
Swamp Monster starts at night 3 in the Laboratory. He is trapped in a cage, but then comes out. When in the office, the player must hide or he will kill you.
Swamp Monster starts at the Laboratory. Then goes to Character Prep 2, Bathroom, Staff Area, Meat Freezer, and then the Office.
Swamp Monster is actually a mutant formed from Employee #2 during a lab experiment.