The Doom Movement Bible

The Doom Movement Bible is a guide written by Andrew Stine (Linguica) that documents various obscure details of Doom's physics related to player movement. The details are of particular interest for speedrunners, since it explains how various tricks can be performed. While many of the tricks were partially known already, Stine conducted extensive original research and analysis of the Doom source code to better understand and explain the causes.

The guide was published in 2016 on the Doomworld forums in the form of a long forums thread, and is divided into sections covering different topics, each of which is contained in a different post. Each section contains illustrations and examples from real Doom speedruns.

Topics covered
Part 1
 * Metrics
 * Straferunning
 * SR50
 * Skip glides
 * Squeeze glides
 * Line skipping (south / west)
 * Item bumping
 * Monsters opening doors

Part 2: The SlideMove Swamp
 * Wallrunning
 * Thingrunning
 * Wallrun "air control"
 * Line skipping (north / east)
 * Momentum preservation
 * Void glide
 * Elastic collisions