Postal 2 is free on GOG until Wednesday 18th December (approx 14:00 GMT).
Postal 2 short description:
Live a week in the life of “The Postal Dude”; a hapless everyman just trying to check off some chores. Buying milk, returning an overdue library book, getting Gary Coleman’s autograph, what could possibly go wrong?
As well as that, the first Postal game (Classic and Uncut Edition) is now also permanently free on GOG.
Postal 2 link: -90% POSTAL 2 on GOG.com
Postal 1 link: POSTAL: Classic and Uncut on GOG.com
Enjoy.