Half-Life Unified SDK
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Important:The Unified SDK is still in development and not ready for use beyond pre-alpha testing and feedback.Do not attempt to use it to make a mod!
Half-Life Unified SDK is a project that aims to provide an updated version of the Half-Life SDK, with full support for the expansion packs 
Half-Life: Opposing Force and 
Half-Life: Blue Shift as well as new features.
Overview
The following types of changes are in scope for this project:
- Bug fixes
- Features to improve the game's code (refactoring, generalizing, simplifying)
- Fixing game-breaking bugs in game assets (e.g. soft-locked trigger setups)
The following types of changes are out of scope:
- Graphical upgrades
- Physics engine changes
- Other engine changes
Requirements
- Requires .NET Desktop Runtime 6 for the tools
Tools
Several standalone tools are branded as part of the "Unified SDK" project, but are separate from the mod code.
- Half-Life Asset Manager, a more robust and more stable replacement for HLMV.
- Half-Life Unified SDK Map Decompiler, a modern BSP decompiler with more accurate results than previous tools.
Quotes
Once the Unified SDK has been released i'm going to archive Half-Life Updated, Half-Life Opposing Force: Updated, Half-Life: Blue Shift Updated and Half-Life Updated CMake.
— Solokiller, Post #346105
