Since Rebellion seems to not know how to code properly as of late and isn't willing (at all, apparently) to fix any of the new bugs they introduced in the 'better' version of AvP that are ruining my enjoyment of the single player mode, allow me to (re)introduce to the world a magical executable coded by someone who doesn't hate the AvP community as much or who has some idea of how to fix code without introducing bugs.
[url=http://homepage.eircom.net/~duncandsl/avp]http://homepage.eircom.net/~duncandsl/avp[/url]/

Basically, when I started to go through the alien campaign for the 20th time (this time being on AvP Classic code), and I saw that the auras *were completely messed up*, I decided to reach for the new and improved (read: old and stable) AvPx. It works on top of the GOG AvP Classic installation.

Biggest differences I see that I love:
UI no longer scales and becomes tiny as your monitor increases in resolution
Alien no longer constantly tripping on acid and misreading pheromones

You cannot use this for Galaxy multiplayer. You may be able to play over LAN, but I haven't tested that feature on top of the GOG install.

The save files work interchangeably *but you have to figure out where in god's name Rebellion put AvP Classic save files*, bonus scavenger's hunt from the developers to rub more salt in your wound.
Spoiler alert: C:\Users\$username\AppData\Local\Rebellion\...

And if you're crazy like me, you can try (and succeed!) to compile the source code, so you can fix that slightly annoying bug with the one alien campaign cheat mode.

I'm still not sure why Rebellion didn't just pay this guy 1K and taken the changes he's made as a baseline for AvP Classic...