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These are a series of registry keys used by various iterations of the Halo engine and its tools. Registry keys ending with a trailing slash indicates that it is a key (and the value is the (Default) value within it), and any that end without it is a value.

Game#

Tools Directory#

[REG_BINARY] HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Halo 2\tools_directory

Map set (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Map Set

Audio Settings#

Whether or not to enable the low-pass filter (?)#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Audio Settings\LowPassEnable

Limit of mono sounds (?)#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Audio Settings\MonoCount

Whether or not to enable reverb#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Audio Settings\ReverbEnable

The speaker configuration selected#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Audio Settings\SpeakerConfig

The number of stereo speakers#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Audio Settings\StereoCount

The volume of sound#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Audio Settings\Volume

Video Settings#

Whether or not to use anti-aliasing#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\AntiAliasing

The specified aspect ratio#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\AspectRatio

The brightness of the game#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\Brightness

The display mode of the game (?)#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\DisplayMode

The gamma of the game#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\Gamma

The size of the in-game HUD#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\HudSize

The level of detail (LOD) to use#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\LevelOfDetail

The screen safe area#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\SafeArea

The screen refresh rate#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\ScreenRefresh

The screen resolution's X value#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\ScreenResX

The screen resolution's Y value#

HKEY_CURRENT_USER\Software\Microsoft\Halo 2\Video Settings\ScreenResY

Guerilla#

Recent files#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\guerilla\Guerilla\Recent File List\File1 [REG_SZ] HKEY_CURRENT_USER\Software\bungie\guerilla\Guerilla\Recent File List\File2 [REG_SZ] HKEY_CURRENT_USER\Software\bungie\guerilla\Guerilla\Recent File List\File3 [REG_SZ] HKEY_CURRENT_USER\Software\bungie\guerilla\Guerilla\Recent File List\File4

Settings (unused?)#

[REG_KEY] HKEY_CURRENT_USER\Software\bungie\guerilla\Guerilla\Settings

Sapien#

Settings#

Whether or not to enable automatic backup#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\autobackup_enable

How often (in minutes) to create a new backup#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\autobackup_interval

How many backups should be stored at a time#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\autobackup_limit

Whether or not to limit the number of automatic backups#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\autobackup_use_limit

Whether or not to use the user-provided backup path#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\autobackup_use_path

Who the hell knows. (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\blah

Whether or not to create a config for tool.exe (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\create_tool_config

The size and position of the hierarchy window (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\hierarchy_window_rect

Unknown (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\main_window_frame

The size and position of the main window (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\main_window_rect

The size and position of the options window (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\options_window_rect

The size and position of the output window (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\output_window_rect

The size and position of the properties window (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\property_window_rect

The size and position of the hierarchy window (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\sapien_loading_window_rect

Something to do with some sort of list size (and position?) (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\type_list_rect

The size and position of the warnings window (?)#

[REG_BINARY] HKEY_CURRENT_USER\Software\bungie\sapien\warnings_window_rect

Auto backup path#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\autobackup_path(Default)

Last directory (unsure if this is last level or just the most recent folder to open)#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\

Class types (all of these are blank - the value is set, just set to absolutely nothing)#

Biped directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\biped directory

Crate directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\crate directory

Creature Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\creature directory

Decal directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\decal directory

Decorator Set Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\decorator_set directory

Detail Object Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\detail_object directory

Device Control directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\device_control directory

Device Light Fixture#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\device_light_fixture directory

Device Machine Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\device_machine directory

Equipment Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\equipment directory

Light Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\light directory

Scenery Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\scenery directory

Sound Scenery Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\sound_scenery directory

Vehicle Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\vehicle directory

Weapon Directory#

[REG_SZ] HKEY_CURRENT_USER\Software\bungie\sapien\weapon directory