Accatone: Is there a way on Desura to add free games to your game list?! If there is, then I guess I don't know it! If it is possible, can someone please explain it to me? Thanks! :)
Azrael360: Currently, the only way to add a free game permanently to your list of owned games, is using the Desura client. The process is the same, but if you're using a browser, you have to choose "Install game" and in the next window "Desura is installed, let's play!". If you have the Desura client installed, you will have the option to download the game with it (if the browser is not set to remember that option).
After that, you can cancel the download before it starts or during the download, because once is added to your list, it will stay that way forever, just like when you redeem or buy a game on Desura (to re-download the installer without the client, or using the client to download and install the game again).
Thank you so much for the explanation! I tried a free game, and cancelled the download before it started and voila, it's added! Will later try a few other free games that I'm interested in.