Developer: Dapper Swine (@DapperSwine)
DRM & Distribution: DRM-Free, Desura, Steam Greenlight
It's hard to ignore the similarities to Angry Birds, but it sounds like it has some cool twists in it as well. Also, online multiplayer!
Blasted Fortress is a physics-based castle assault game with an added layer of resource management. Even while you're not playing, crops grow, market prices fluctuate, seasons change, and you may come back later to be greeted by disasters that happened while you were away or gifts to bolster your resources. It's a blend of physics decimation, looting, hoarding, and RPG-style enhancements. If you're more creatively inclined and want to add more content to the game, you can even create your own buildings to siege using the built-in building editor.
Here's a link to the video below if it doesn't play here. Note that this video has the old art style. See the images below for a look at what the game looks like now.