Opposing Force 2 RED 1.35 demo version file

What is this? First time I read about this? Is this for Hl1 Opfor or Hl2 ep2? Judging by the screen it could very well be Hl1 with ported contents of hl2. I'm just not sure. Either way I'm downloading it right now, curious to see what this is.

The newly released version as well as the original page was also deleted today. I got the latest version before the deletion but not the following patch, I'll upload it as well if it never comes back.

There's a very annoying issue in this where whenever you press almost any key, your character gets stuck in crouch mode. It even happens when you try to jump to press the console. Real shame because the levels in this one seemed to have the enemy placement a bit better and had better viewmodels for the weapons. However with this issue that keeps occurs, the game is pretty much unplayable in a normal fashion.