Portal 2 mod. crossover with subnautica. Hope you enjoy this mod. Have fun portaling your way through Alterra :D.

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ALTERRA: Portal 2 Mod

ALTERRA: Portal 2 Mod

Puzzle

This is a crossover between Portal 2 and Subnautica. It takes place in either Alterra or Apeture(it isnt decided yet).

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