ARK Survival Evolved for $17

[Gopnik]

ARK is a video game where you get spawned on a island and have to survive in a world full of dinosaurs. You need to collect materials to craft items, build a house, tame dinosaurs, explore caves, defeat bosses, advance in technology and much other things. The game might be a little hard at the beginning but once you get to the basics and learn some tactics it's definitely going to be more fun.

The game is costly and this is surely a nice discount which you can take advantage of - deal page.

EDIT: Eww, it seems that the deal has expired just a few hours after I posted it...