I have just released Spherical Nightmares, a Half-Life 2: Episode Two single-player mod. Something that started as a "small" school project, but ended up being long development process. I had previously only done multiplayer level design, mostly for Quake 2 but was really eager to create an interesting single-player experience in the Half-Life 2 universe.
Here is the trailer:
Official website: http://www.sphericalnightmares.com/
How to install:
1. Extract to ..Steamsteamappssourcemods
2. Restart Steam
3. The mod is now lis