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OpenSauce (often just "OS") is a mod for Halo Custom Edition and its editing kit. It enhances the in-game experience with customization and engine extensions, but also offers modified versions of the HEK tools for more extensive modding of the game. It is mostly used as the base for experimental maps and singleplayer overhaul mods like CMT's SPV3.

OpenSauce is incompatible with Chimera. Attempting to use both at the same time will result in crashes or a white screen when launching the game.

OS_Tool

OS_Guerilla

OS_Sapien

Game features

Note that OpenSauce uses the filename initc.txt for init scripts instead.

Crash reports can be found in <DRIVE>:\Users<USER>\Documents\My Games\Halo CE\OpenSauce\Reports.

New tag types

These extended tag types are specific to OpenSauce .yelo maps and are only supported by the OpenSauce mod:

Tag name

Group ID

actor_variant_transform_collection

avtc

actor_variant_transform_in

avti

actor_variant_transform_out

avto

effect_postprocess

efpp

effect_postprocess_collection

efpc

effect_postprocess_generic

efpg

equipment_hud_interface

eqhi

model_animations_yelo

magy

multilingual_unicode_string_list

unic

project_yellow

yelo

project_yellow_globals

gelo

project_yellow_globals_cv

gelc

shader_postprocess

shpp

shader_postprocess_generic

shpg

shader_postprocess_globals

sppg

string_id_yelo

sidy

tag_database

tag+

text_value_pair_definition

sily