The Puking Baby Plant is one of many plant-based monsters that never made it into the full game.[1] Though it is unknown how the Baby Plant would have functioned in-game, however, the sketch on the upper left corner does appear to show the monster burrowed underground. It may have also spewed out deadly spores.
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↑ 1.01.1"Initially, monsters in Amnesia: TDD were meant to be disgusting plant-human hybrids. Some idea were: - Fish-face - Headless brute - Puking baby-plant - Flower-man #Amnesia10Years" - Frictional Games. September 8, 2020.Twitter.