So as some of you may or may not know, Hucast has released an updated version of their game, Dux called Dux 1.5.

What most may not know is that if you already own Dux you're entitled to a free copy of Dux.

Check out Hucast's Facebook page for details.

Hucast Games - We still have many DUX 1.5 revision discs... | Facebook

In short, you basically just have to prove you still own it.