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S.T.A.L.K.E.R.: Lost Alpha

From PCGamingWiki, the wiki about fixing PC games
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This product is unreleased but remains under active development - information may change frequently and could be outdated or irrelevant.
S.T.A.L.K.E.R.: Lost Alpha
S.T.A.L.K.E.R.: Lost Alpha cover
X-Ray Engine
Release dates
Windows April 26, 2014
Monetization Freeware
Microtransactions None
Modes Singleplayer
Pacing Real-time
Perspectives First-person
Controls Direct control
Genres Action, Shooter
Art styles Realistic
Themes Eastern Europe, Post-apocalyptic
Series S.T.A.L.K.E.R.
S.T.A.L.K.E.R.: Lost Alpha on MobyGames
S.T.A.L.K.E.R.: Shadow of Chernobyl 2007
S.T.A.L.K.E.R.: Clear Sky 2008
S.T.A.L.K.E.R.: Call of Pripyat 2009
S.T.A.L.K.E.R.: Lost Alpha (Unofficial) 2014
S.T.A.L.K.E.R. 2: Heart of Chornobyl 2024

Key points

Fan game that tries to recreate the original design and atmosphere of S.T.A.L.K.E.R.: Shadow of Chernobyl as seen early in development.
Does not require any of the official S.T.A.L.K.E.R. games installed.

General information

Mod DB page


Source DRM Notes Keys OS
Official website
Free download.

Essential improvements


Standalone install and new game start needed.
The latest official patch v1.4007 titled Director's Cut is available at

Skip intro videos

Start game with -nointro parameter[citation needed]

Game data

Configuration file(s) location

System Location
Windows <path-to-game>\appdata\user.ltx[Note 1]

Save game data location

System Location
Windows <path-to-game>\appdata\savedgames[Note 1]


Video settings.
Video settings.

Graphics feature State Notes
Widescreen resolution
4K Ultra HD
Field of view (FOV)
Open console and type fov xx (replace xx with the FOV you want).
Borderless fullscreen windowed
Disable fullscreen and set the game's resolution to the same value you use for your screen.
Anisotropic filtering (AF)
Anti-aliasing (AA)
MSAA. Available only for DX10 and DX11 renderers. Broken in 1.3000.
Vertical sync (Vsync)
It is recommended to force Vsync through the GPU control panel.[citation needed]
60 FPS and 120+ FPS


Keyboard and mouse State Notes
Binding anything to F5 or to any key already being used will crash the game on load.
Mouse acceleration
Mouse sensitivity
Mouse input in menus
Mouse Y-axis inversion
Controller support


Audio feature State Notes
Separate volume controls
Surround sound
1.3002 onwards only supports non-OpenAL software driver (described in menu as DirectSound), though OpenAL32.dll is still being used, and can be replaced with Win32 OpenAL Soft library, to enhance positioning (Rapture3D 2.7.4 no longer works like in SoC, returning error). Copied dsound.dll to the game directory has priority over OpenAL library, so don't forget to delete dsound.dll if you wan't to use OpenAL (1.4005).
Closed captions
Mute on focus lost
EAX support
Royalty free audio


Language UI Audio Sub Notes
Fan translation, download.
Fan translation, download.
Brazilian Portuguese
Fan translation, download.

Issues fixed

Unable to save, load or make screenshots

Install in non-default location[citation needed]

Install the game outside Program Files.

Run as Administrator[citation needed]
  1. Right click your game shortcut.
  2. Select "Run as Administrator".

Missing footstep sounds

This bug can also cause game crashes.
Disable first person body awareness[citation needed]
  1. While in-game, open console with ~ button.
  2. Enter g_actor_body off command.

Various problems on 32bit systems

Delete files[citation needed]
  1. Go to <path-to-game>\bins\
  2. Delete or rename msvcp120.dll, msvcp120d.dll and msvcr120.dll.

Low FPS troubleshooting

Game settings tips for preserving the best graphics and performance

Max out and turn on all settings, and to improve FPS, set sliders and options as following (ready config):

  • Vision distance to 5/11 (0 or 2 causes frequent disappearing of some objects)
  • Objects detail to 3 or 4+ (0 - low texture quality in distant [e.g. on hills in Cordon - avoidable by setting 2-3 points above 0])
  • Grass density to 0 (or 3/4, 1/4, depends on a taste)

In the second place:

  • Grass shadows off (minor visual impact with some performance impact, though depends on API and taste)
  • Sun rays off (like above)
  • HDAO is claimed to be optimized for AMD
  • HBAO for Nvidia cards (the last option)

Disable for 1 FPS gain on each (from 23 FPS):

  • Ambient Occlusion (entirely)
  • FXAA
  • Soft Particles
  • Anisotropic Filtering
  • MSAA from x2 to 0


  • Keep Sun shadows always on (massive change of lighting)
  • V-Sync off (reportedly reported frame lock working sometimes below native monitor frequency - depending on FPS dips; alternatively force V-Sync in your GPU panel)
  • Keep textures in RAM off
  • Object prefetching on (disabled cause stuttering, delete -noprefetch from your shortcut properties).
Settings tested on Q9650/HD7870.
  • Some settings may require the game restart, even if you're not asked to do so (e.g. grass density, texture quality, MSAA).
  • Restart the game (instead of just clicking quit the game and load last save) in case of performance decrease after changing details a lot of times.
  • If your game settings stopped to be saved after the game restart, change the settings and save them before loading the game.
  • Run the game only from a desktop shortcut to avoid crash on launch.
  • Alt+Tab cause engine error (at least with Reshade). As a workaround, disable full screen, and enable it again after task switching.
  • Game utilizes the computing power of more than two cores mostly only during loading (at least distributes load rather linearly only at this moment).
Use compatibility mode of Windows Vista SP2 or XP SP3

Double FPS boost in certain, rather more rare areas with ~>99% GPU usage, and is visible after >1 minute after loading save (e.g. Monolith base. Before and after saves - also settings testing place)

Causes very slow level loading times, saves, the main menu, or causes rare hang after pressing ESC.
  • You can preserve FPS gain achieved in compatibility mode by saving the game and loading it in the game launched normally.
  • FPS drops again after triggering progress during quests (e.g. after quest text appearing, spawning new enemies - usually when the game stops for a few seconds, or stutters).
  • Turn on shader cache in GPU driver panel to increase save and level loading times (SSD recommended).
  • Compatibility mode in some cases increases VRAM usage by ~300 MB.

"Can't open video stream" crash

Install Xvid[citation needed]

Install Xvid.

VR support

3D modes State Notes
Officially supported game, see official vorpx game list.

Other information


Executable 32-bit 64-bit Notes


Reshade by YoYo

Preset contains bigger color saturation, contrast, more lightning effects, slight DOF on horizon elements and a vignette in the game.
Download it here, version with effects included here.

Maddo CoC Reshade

Intended to improve image quality without making drastical changes.
Download it here or here

ENB + SweetFX Mod

Tries to make the game look realistic by adding SSAO, SSIL, Bloom, SMAA, sharpening and color corrections.
Other presets

System requirements

Minimum Recommended
Operating system (OS) XP
Processor (CPU) 2 GHz
System memory (RAM) 2 GB
Hard disk drive (HDD) 20 GB
Video card (GPU) Nvidia GeForce 9800 GT
ATI/AMD Radeon HD3000 series


  1. 1.0 1.1 When running this game without elevated privileges (Run as administrator option), write operations against a location below %PROGRAMFILES%, %PROGRAMDATA%, or %WINDIR% might be redirected to %LOCALAPPDATA%\VirtualStore on Windows Vista and later (more details).