"Open source" is an adjective.It is used to describe stuff.The definition(s) can be found here:
http://en.wikipedia.org/wiki/Open-source_software
"Open-Sauce" is a program/extension to the Halo engine.
Instructions can be found here: http://code.google.com/p/open-sauce/wiki/Doc_Halo1_GettingStarted
Open-Sauce tags shouldn't be extracted from .yelo's,unless you are going to be provided with the shaders(or if you want to make your own).OS shaders will get corrupted when extracted.

Edited by Dumb AI on Aug 23, 2012 at 07:49 PM