This and a few other games are on Humble Bundle for "pay what you want". This means you can pay only 1cent if youd like.
Links: can be found on
https://www.mydealz.de/deals/humble-6-steam-spiele-fur-1-cent-jeweils-1159603
(German deal/discount sharing site, although there is no need to know German for it. Just klick the links on there.)
There are reports in the comments on that site, that the keys for Dale Hardshovel don't work, but Humble bundle is working on that..