Nightcrawler Heavy Soldiers appear towards the end of Perseus Mandate. This type of Nightcrawler soldier first appears in Interval 06 - Exploration - Labyrinth, and they are the player's primary opponents for the last four levels of the game. The Nightcrawler Heavy Soldiers can be distinguished by the fact that they wear a white goggle apparatus instead of the black mechanical facemask/gasmask worn by Nightcrawler Light Soldiers, as well as by their heavy equipment backpacks.