It's an official demo version of the singleplayer version of the mod, dated by December 30th of 2003. It includes one small SP mission (3 maps), which is not avaliable in full releases of the mod. This is an installer for the English version of the demo.
So when you upload the full version? Mod is released in 2005 and this demo is made in 2003.
There is no full version. Didn't you read the description?
There is an almost full version already:
Moddb.com
But it's not compatible with Steam and has other different lacks. I want to make a custom edition of the mod, which will include all possible features, missions and additional fixes. It will be compatible with any version of Half-Life, including a possibility to play it with using of WON HL, Steam HL or Xash3D Engine. I already did some work for this, but I still need to do yet more things (english translation, new mission launcher etc.). If someone wants to help me with this, PM me.