Part 16 I hate this part of the game. Took me a few tries. Stasis Beam is useful against the Possessors , then blast them with a Boson Dart. Having the Slam Dunk Trap helps too. ... Ghostbusters the video game egon spengler raymond standtz winston zeddemore peter venkman ghosts proton pack codex museum natural history walter peck elisa mayor possessors ivo shandor black slime doctor dr rutherford gozer exhibit