Weapons, the world, the train and the chainsaw engine itself are synthesised in code. Monster voices, gore and the chainsaw’s recorded layers (pull-cord, idle / full-throttle / cutting beds, bites, shutdown) use the clips below: third-party recordings used under Creative Commons licences, edited for this game (excerpted, trimmed, filtered, looped, level-normalised, converted to Ogg Vorbis; some pitch-shifted or layered). Thank you to the authors.