Play as the king all over Black Mesa including in Dukematch.
Here's the source code of Half-Nuked, I just don't have a lot of time to dedicate to this mod and I don't think I'll work further on it, feel free to toy around with it, or even continuing it's development, that's up to you.
Aww that's a shame, but atleast you released the Source Code for someone else to continue it. ;3
I might take a look at it down the line.
=C