https://www.gamespot.com/articles/last-chance-to-get-a-great-pc-game-for-free-from-g/1100-6455745/

Those looking for something new to play can get another PC game completely free on GOG. As part of its ongoing winter sale, the digital store is giving away another great title. This time, it's the supernatural adventure game Oxenfree, which is available at no charge right now for a very limited time.

Beginning December 19, you can download Oxenfree for free just by visiting GOG. The offer expires on December 21, giving you less than 24 hours at this point to claim your copy. To download the title, simply click the "Get for free" button on the store's homepage. You can also claim a digital copy from Oxenfree's product page. The game is DRM-free and works with Windows, Mac, and Linux.