GoG.com continues to add classic games to their DRM-free download service and today they have added two more titles to their line-up, with a third coming soon. The CD Projekt -run site has cut a deal with UK based Firefly Studios to offer up the first two games in their Stronghold series to the service.

The first game, Stronghold, is now available to purchase and download for $5.99, offering players a chance to run a medivel castle and protect it from raids. The download includes a free soundtrack and a free mini-game. Another game in the series, Stonghold Crusader, will be added later for $9.99. Also added on GoG.com today is Waxworks. The horror adventure game from Adventure Soft is now available to download for $5.99.