It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

This is a little confusing, looking at the page i see a installer for SPAZ 1.605 and it appears to be completely free...

The directory under 'free stuff' is here too, which includes patches.

edit: Downloaded the files and extracted them, and i get an activation key screen. So i think it's the full game, just not pre-registered.
Post edited January 12, 2017 by rtcvb32
AFAIK if you buy from dev directly, you get that activation key in email to unlock the installer.