GOG.com has revealed an interesting new promotion called Battle of the Games. In essence, a public vote is held over 24 hours, with two classic games each vying for a hefty discount.
The first round pairs up "the two best-selling PC adventure games in history", with gamers able to pick between Myst: Masterpiece Edition and The 7th Guest. The popular choice will then receive a 60% discount for 24 hours (second gets 40%).
On top of that, those nice people over at GOG.com are offering two games for free. Worlds of Ultima: The Savage Empire (here) and Ultima: Worlds of Adventure 2: Martian Dreams (here) can be downloaded from the site.