Half-Life 2: Lost Coast

is a playable technology showcase that introduces High Dynamic Range lighting to the engine.
The game is available for free to all owners of , and can be only obtained after purchasing . It was originally planned as a section of the Highway 17 chapter of Half-Life 2.
Additionally, a cut down version of Half-Life 2: Lost Coast is available in the Source SDK Bases as a non-playable hardware test, labeled SourceTest (or Source Engine Test). This version is reduced to only the preprogrammed camera following a path that leads the viewer up the mountain. After the sequence completes, the user is presented with a dialogue showing their system performance & framerate and an option to upload them to Valve (which requires to be enabled, and possibly no longer works since the servers for this feature was likely shutdown). This version also lacks the commentary or any user playability whatsoever.
Since 20th anniversary update, are now accessible through menu (under "Extras"), alongside Half-Life 2 Episodes (, ). However, Valve removed the "Video Stress Test" option from the menu, but it can be accessed through , but after the benchmark is completed, the option to upload the results become non-functional as the console command has been removed.
== Features ==
; High Dynamic Range rendering 
: A simulation of brightness values outside computer monitors' actual range, and of aperture adjustment.
* It also features a new Commentary System with comments from Viktor Antonov, Randy Lundeen, Robin Walker, Gary McTaggart, Gabe Newell, and Chris Green.
== Architecture ==
* Byzantine monastery
** Outer courtyard
** Crumbling interior
** Stained glass
** Patchy murals
* Small town/village in the distance
== Environment ==
* Smoothly rounded cliffs and stacks
** Bottom few feet should be made reflective to indicate recent wetness
* Expanses of wet, rocky sand
== NPCs ==
* 
* 
* 
* 
* with a helicopter model
== Gallery ==
HL2_LostCoast_18.jpg|St. Olga
HL2_LostCoast_02.jpg|Coast
Lostcoast bay.jpg|Bay view from Coast
HL2_LostCoast_06.jpg|Bay view from Cliffs
HL2_LostCoast_09.jpg|Cliffs
HL2_LostCoast_10.jpg|Yard
HL2_LostCoast_17.jpg|Entrance
HL2_LostCoast_15.jpg|Entrance
HL2_LostCoast_12.jpg|Monastery
HL2_LostCoast_16.jpg|Monastery
St olga altar view.jpg|Altar
HL2_LostCoast_01.jpg|Altar (Opposite view)
== System Requirements ==
Windows (Old Engine):
*OS: Windows 98 / ME, 2000, XP or later
*CPU: 1.2 GHz (Pentium 4 or Athlon 2800+ processor)
*RAM: 256 MB 
*Disk space: 4.5 GB 
*Direct3D 9.0 compatible video card (with atleast DirectX 7.0 compatibility level or higher)HDR requires DirectX 9.0 or higher graphics card
Windows (New Engine):
*OS: Vista, 7 or later
*CPU:1.7 GHz and/or Dual-core 
*RAM:1GB RAM
*Disk space: 6.5 GB (15GB+ recommended)
*GPU: NVIDIA GeForce 6xxx series, ATI Radeon X1600, Intel HD Graphics 3000 (with 128MB VRAM)
*Direct3D 9.0 compatible video card (with atleast DirectX 8.0 compatibility level or higher)HDR requires DirectX 9.0 or higher graphics card
OS X:
*OS X 10.5.8, 10.6.3 (up to 10.14.6)
*CPU: 2.0 GHz and/or Dual-core
*RAM: 1 GB
*Storage: 6.5 GB (15GB+ recommended)
*GPU: NVIDIA GeForce 8xxx series, ATI Radeon X1600, Intel HD Graphics 3000OpenGL 2.1 compatible
*Audio: OpenAL compatible
Linux:
*OS: Ubuntu 12.04, SteamOS 1.0 or laterOther Linux distros supported.
*CPU: 2.0 GHz and/or Dual-core
*RAM: 1 GB
*Storage: 6.5 GB (15GB+ recommended)
*GPU: NVIDIA GeForce 8xxx series, ATI Radeon X1600, Intel HD Graphics 3000OpenGL 2.1 compatible
*Audio: OpenAL compatible
== External links ==
* on Combine OverWiki
Category:Half-Life 2 
Category:Regions & Atmospheres
Category:Source 2013 SP engine branch games