Oxenfree, the indie horror game published in the 2016 by Night School Studio, is available free on GOG, as part of the winter sales. The only requirement is of course to own a GOG account, which is free to create.
Oxenfree is a point and click praised for his writing, and we highly recommend that you make this small gift as long as you are on time. The offer, in fact, it will only be available for 48h. You can get this little gem here. If you want to take a look to be sure, here's the Oxenfree trailer: