A game engine developed by Looking Glass that is used in Thief: The Dark Project, Thief II: The Metal Age, and Electronic Arts/Irrational Games' System Shock 2. The weakness of this engine is its inferior graphical capabilities, but it handles sound like no other. From working with it, I know it also features an interesting Newtonian physics system, conversation scripting, myriad Act/React properties, etc. The Dark Engine's editor is "Dromed". The new engine that Looking Glass was working on for Thief III was code-named the "Darker Engine". We'll never see it, unfortunately.