PortalSector - A 2.5D Game Engine in the spirit of Duke Nukem 3D Build Engine and Doom Engine. Written in Javascript.

A 2.5D Game Engine similar to the Duke 3D Build Engine written in Javascript, based on Bisqwit’s original C code.
View Bisqwit’s original C code here.
Features
- True Room-over-room capabilities (TROR)
- Euclidean and Non-Euclidean Geometries
- Built-in sector editor
- Parallax skies