HL2-style, classic FPS movement for Unreal Engine implemented in C++

SteamVR driver for Half-Life-Alyx for playing without VR / драйвер для игры без VR

🛢 Dumping things, so you don't have to

Load Source games maps as combined meshes correctly positioned relative to each other

Exposing SteamWorks functions to SourcePawn.

Unity level design plugin that adds support for Quake .MAP / Half-Life .RMF / Source .VMF, Q1 HL1 .WAD textures, and .FGD export.

Half-Life 2 Chaos is a chaos mod for Half-Life 2

Port of Portal 1 2007 leaked source code to Source SDK 2013. Also includes fixes for Half-Life 2 maps and gameplay.

Half-Life 2 series Co-Op Gamemode

Recreation & expansion of NPCs, entities, and weapons from the Half-Life series into Garry's Mod!

SRC Repair is a free open source tool that can be used for tuning and cleaning up Steam and Source engine games.

Source / Goldsource dedicated server images built through use of steamcmd. 🐳

Original HL2 Source SDK from 2004

Bullet Physics Injection for Source SDK 2013

Source code for the free Steam game, Estranged: Act I.

Prometheus Exporter for SRCDS game servers, working with CSGO, CSS, GMod, HL2, L4D2 and TF2 !

Another Source Engine Modified Version with some new features.

A Source Engine 2013 SP mod aimed to provide bug fixes and various development features

Half-Life 2 Deathmatch sourcemod plugins