I didn't think so, but I've known it for years.
Its an RTS, everyone gets a priest, temple, and starting island. Your units are buildings that can be of 3 unique elements, with a unique lineup of buildings. You use those bridges to send peons to get resources or have your priest make new bases. Those are your only types of traditional units, everything else is fixed in place (but may release lesser units) and powered by generators like Protoss pylons.
Win by capturing an enemy priest and sacrificing him on your altar.
The bridges are the most unique part, you can pick them with the keyboard and you can make these windings webs of them to build weapons off of, block your enemy, etc. Game rules.