Another Free Game offer. This time it is from GOG and again as with the others there are some small hoops to go through. You will need to supply an email address and sign up for a GOG membership (not onerous). Use a disposable email address if not comfortable with getting emails from GOG about offers.
YMMV Not sure how it will work on your machines but as it is free worth a try (also able to be run on some versions of Linux)
Not sure when this offer will expire so if you want it get in quick, and I will delete the link on offer expiry (LINK DELETED AS EXPIRED)