The Humble Store is giving away free copies of Age of Wonders III. The free game promotion runs for 48 hours only. It is meant to promote Humble Store’s Spring Sale.
Age of Wonders III is a 4X turn-based strategy game. Here is a description from the developers:
Delivering a unique mix of empire building, role-playing, and warfare, Age of Wonders III offers the ultimate in turn-based fantasy strategy for veterans of the series and new players alike!