Limitations of PSDoom It is easy, and even tempting, to kill the wrong process. Monsters (processes) kill each other. (read bullet) This screenshot shows a panicked user mowing down all his processes. Here's where the mapping between first-person-shooters and process management breaks down. The strategies and goals of playing Doom and using PSDoom do not coincide. In Doom, the player kills anything that moves. In PSDoom, one should only attack monsters if the processes need to be slowed down or killed.