Orange Box (engine branch)/en
The Source 2007 engine branch, also known as The Orange Box engine branch, was released in Oct 10, 2007 with the release of 
The Orange Box (
, 
, and 
), succeeding the Source 2006 engine branch.
It was maintained side-by-side with the 
Left 4 Dead engine branch, which, around this time, all first-party Source 2006 (except 
) and Source 2007 games were upgraded to Source 2009 throughout until July 2010, when it was obsoleted by the release of the 
Alien Swarm engine branch.
Despite this, the 
Source 2013 Singleplayer and 
Source 2013 Multiplayer branches were released in 2013 as more direct upgrades for these games. Furthermore, the movement system, starting with Source 2007 branch, it has been changed by Valve as an attempt to stop Bunnyhopping exploits, which actually ended up creating a new glitch called Accelerated Back Hopping.
In May - June 2010, all first-party Source 2006 and Source 2007 games for PC (except for Half-Life: Source) were upgraded to Source 2009, which adds support for 
macOS, aswell introducing achievements for PC/Mac version of 
Half-Life 2 and 
Half-Life 2: Episode One. Optionally, achievements was also supported on third-party mods.
The Orange Box builds on the original Half-Life 2 branch, requiring its content installed to work.
Versions
There are three Orange Box branches, referred to in the SDK Launcher as Source 2007, Source 2009, and Source Multiplayer. The 2009 and MP branches do not have a different feature set, but they are incompatible with 2007 due to various under-the-hood changes (which include a different SteamID scheme and Mac OS X compatibility).
Features
New since the 
Source 2006 engine branch are:
2007
- Threading
- Logic, rendering and audio have been threaded for performance gains in multi-core environments.
- Soft particles
- An all-new, artist-driven particle system, replacing the old hard-coded particle system.
- Shadow mapping
- Special dynamic lights such as the player's flashlight can now cast high-quality dynamic shadows.
- Improved High Dynamic Range rendering
- Remade HDR tonemapping that better fits outdoor scenes.[1]
- Motion blur
- Cheap and simple camera motion blur.[1]
- Hardware Morph (HWM) flexes and Wrinkle maps
- A new, powerful facial animation system, with support for textures that add fine wrinkling detail to the face during flex animation.
- Conditional statements
- New conditional statements for use in materials to optimize them for lower-end machines.
- Phongwarp textures and other Phong improvements
- Source's phong shading, introduced in Source 2006, has been upgraded with additional features such as reflection tinting, albedo tinting, phongwarp textures, and more.
- Self-shadowing bump maps
- A special, cheaper kind of bump map for brush shaders with baked in shadows to give the illusion of a self-shadowing surface.
- Automatic displacement texturing
- Mitigates texture stretching across displacement surfaces.
- Alpha to coverage
- Vector-like edges to raster images, fast.
- Flowing emissive textures for models
- Advanced flowing emission for
VertexLitGeneric, notably used on the Vortigaunts in Half-Life 2: Episode Two - Fresnel for specular reflections and self-illumination on models
- On VertexLitGeneric,
$envmapand$selfillumhave new parameters to enable shading with the Fresnel effect. - Cinematic Physics
- Baked physics animations that are rendered offline and brought into the engine for playback with minimal performance cost.
- Visclusters
- A new entity to be placed in large open areas with unbroken visiblity, reducing compile times.
- Bink video
- Replaces the old AVI file format which was used on game intros.
- Maplist Thumbnails
- A console-oriented server browser UI.
Xbox 360 support- Of little use to modders, needless to say! Aside from that, native support for the Xbox 360 controller has been added, alongside with XInput support.
2009/MP
- Mac OS X support
- Supported since 2010 engine update. The engine can now run on Mac. However, Mac support outside of official games may be spotty.
Furthermore, newer version of macOS since 10.15 (Catalina) no longer support all 32-bit apps and games in general (which also includes every single Source engine games that are complied for 32-bit only). - QuickTime video (MOV) (only in )
- Replaces BINK video and only used on macOS systems. Some games may also support Bink video on macOS.
- Particle system adjustments
- Particles can now render blobs and models.
Not available in subsequent branches (removed in
Source 2013, and not ported upstream to Alien Swarm engine branch). - Disable
phys_bone_followers - phys_bone_followers can now be disabled on dynamic props for performance gains and lower entity counts.
2013
Source 2013 (both SP and MP) has its own page.
Availability
Most games using this branch (except Console version of those games) were upgraded to the Source 2013 or Source 2013 Multiplayer branches when those released. Nevertheless, gamecode for the 2007 branch is included in the now-deprecated Source SDK app.
Source 2007
2007
Age of Chivalry2007 Source SDK Base 2007 (formerly Source SDK Base - Orange Box)2009
Obsidian Conflict (ModDB version - Steam version runs on Source 2013)2011
E.Y.E: Divine Cybermancy2012
Black Mesa (Mod version only)- Only in ( Xbox 360 and
PlayStation 3), all games are from The Orange Box package:
2004 Half-Life 2 ( Xbox 360 and PlayStation 3 version)2006 Half-Life 2: Episode One ( Xbox 360 and PlayStation 3 version)2007 Half-Life 2: Episode Two ( Xbox 360 and PlayStation 3 version)2007 Team Fortress 2 ( Xbox 360 and PlayStation 3 version)2007 Portal ( Xbox 360 and PlayStation 3 version)2008
Portal: Still Alive ( Xbox 360)
Source MP
2010
Bloody Good Time[confirm]
Source 2009
2009
Zeno Clash2009
Vindictus[confirm]
- Heavily modified, and uses proprietary file format to store game files.
2011
Postal III
- Modified to add custom textures and other addons support through DLL Injection (
p3.dll), also added PhysX physics engine.
- Modified to add custom textures and other addons support through DLL Injection (
