• Git. Follow Git downloads.
• CMake. Can be C++ CMake Tools for Windows component of Visual Studio.
• Visual Studio 2022 with v143+ platform toolset. Use Desktop development with C++ workload and select additional Windows 11 SDK <latest version>, C++ ATL for latest v143 build tools, C++ MFC for latest v143 build tools individual components.
• Create Github account if needed.
• Setup SSH key connection for your Github account.
• Half-Life 2, Half-Life 2 Episode 1/2 or Portal game. You need steam_legacy branch for Half-Life 2 and episodes, as 20th Anniversary Update not supported yet.

• Open Git bash (search in Start menu).
• Change directory to place where source code be located by typing: cd <directory to place source>.
• Clone repository by git clone --recurse-submodules git@github.com:Source-Authors/Obsoletium.git in Git bash.
• Open Visual Studio 2022 <ARCH> Native Tools Command Prompt For VS2022 shortcut (search in Start menu) where <ARCH> is CPU architecture you want to build for. Supported values are x86 and x64. x64 is experimental.
• Run create_<GAME_NAME>_dev_<ARCH>.bat in opened command prompt where <GAME_NAME> is game to build, <ARCH> is same as in step above. See cloned repository directory tree for supported games.
• Open <GAME_NAME>_<ARCH>.sln.
• Build by selecting Build menu, Build Solution submenu.

• Open Git bash (search in Start menu).
• Change directory to place where source code be located by typing: cd <directory to place source>.
• Clone repository by git clone --recurse-submodules git@github.com:Source-Authors/Obsoletium.git in Git bash.
• Open Visual Studio 2022 <ARCH> Native Tools Command Prompt For VS2022 shortcut (search in Start menu) where <ARCH> is CPU architecture you want to build for. Supported values are x86 and x64. x64 is experimental.
• Run create_hammer_<ARCH>.bat in opened command prompt where <ARCH> is same as in step above.
• Open <GAME_NAME>_<ARCH>.sln.
• Build by selecting Build menu, Build Solution submenu.

• Ensure you placed hl2 / episodic / portal game into game folder near cloned repository. Your directory structure should look like this:

  |
  |-- game <directory with game>
  |
  |-- source <directory with cloned source repository>

• Open <GAME_NAME>_<ARCH>.sln in source directory.
• Set launcher_main project Command property to $(SolutionDir)..\game\hl2.exe.
• Set launcher_main project Command Arguments property to -dxlevel 85 -windowed.
• Set launcher_main project Working Directory property to $(SolutionDir)..\game\.
• Click on Set as Startup Project menu for launcher_main project.
• Start debugging.

• Ensure you placed hl2 / episodic / portal game into game folder near cloned repository. Your directory structure should look like this:

  |
  |-- game <directory with game>
  |
  |-- source <directory with cloned source repository>

• Open <GAME_NAME>_<ARCH>.sln in source directory.
• Choose Release Configuration.
• Build.
• game folder contains the ready game.

• Ensure you placed hl2 / episodic / portal game into game folder near cloned repository. Your directory structure should look like this:

  |
  |-- game <directory with game>
  |
  |-- source <directory with cloned source repository>

• Open hammer_<ARCH>.sln. Append x64\ to bin in commands below for x64 Hammer.
• Set hammer_launcher project Command property to $(SolutionDir)..\game\bin\hammer.exe.
• Set hammer_launcher project Working Directory property to $(SolutionDir)..\game\bin.
• Click on Set as Startup Project menu for hammer_launcher project.
• Start debugging.

If you found a bug, please file it at https://github.com/Source-Authors/obsolete-source-engine/issues.

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