Sign up to receive each week’s Playlist e-mail here! Also check out our full, interactive Playlist section. In Ruins (PC, Mac) TOM BETTS The craggy, mysterious ruins of Ico’s fortress-like castle are known for their wind-blown eeriness. Tom Betts has taken that game’s architecture and used its melancholy character as a model for one of his experiments into procedural generation. The idea, he says, is to interpret the work of Romantic landscape painters, such as Thomas Cole and Caspar David Friedrich, as a sublime videogame. The result is an island of broken ramparts, cold beaches, and overgrown pathways that lead to crumbling…