Spirit of Half-Life (SoHL) is a modified game engine for Half-Life 1 modders that includes many new things not seen in the original Half-Life engine by Valve. This includes reflections, mirrors better lighting, weather like moving clouds, rain, snow, and fog. Physics capabilities like picking up objects and dropping them, or when some thing explodes objects go flying off in the direction.
What is a source code? :S
Its a taken-apart dll that coders use to add bran new concepts like more weapons, enemies, etc to their mod.
owned? :S
Source for 1.7
Downloads.ammahls.com