Real-time strategy Offworld Trading Company and 2D platformer GoNNER are both free for a limited time on the Epic Games Store. These games normally cost 29.99 and 9.99 euro but for the next seven days you can get them for free. The offer ends on Thursday, March 12.
To get the games, just go to the Offworld Trading Company and GoNNER pages on the Epic Games Store, and click the "GET" button. Once you get the games, they will be yours forever.