Modder ‘shokunin000’ has been working on a single-player mod for Half-Life 2 in the past two years. This modder recently released this mod, and you can find a download link below (as well as a trailer that will give you an idea of what to expect from it).

Transmissions : Element 120 is a short single player experience set in the Half-Life Universe featuring a unique gravity defying weapon that allows you to jump buildings and sustain large falls.

The story takes place at a mysterious date & location after the events of Half-Life: Episode 2.

Here are the key features of this mod:

• Enhanced dynamic lighting
• Integrated Source Shader Editor 0.5 for enhanced post processing & lighting
• Improved support for complex physics structures
• Support for super massive physics objects
• Improved AI and situational awareness on multiple AI types

Those interested can download it from here.

Enjoy!