I defeated all three different versions of Walter Sullivan where he appears as a child before he got brainwashed by The Order. Secondly, I took down his ghost self which explains why he can move very fast in the final boss fight as well as him appearing within various places like the forest and apartment. Lastly, I defeated The Conjurer who is supposed to be Walter Sullivan's "true" self. Half of the time I feel sorry for Walter Sullivan that his parents abandoned him inside Room 302. As if it wasn't horrible enough, The Order brainwashed him with their teachings and he had to live off the streets like a hobo. Walter had to rely on pennies, dimes and quarters to survive which is a very shitty way to live. The other half I don't feel sorry for him because he brutally murdered 21 people and every single PET in Steve Garland's pet store. Who the fuck would do something so sick and twisted like that?! I know you can't resurrect them but at least justice was served ultimately in the end. Enjoy!