There's a webcomic called Stand Still, Stay Silent, which recently spawned a spinoff computer game, City of Hunger, that'll be playable in alpha mode soon (within two or three weeks, though not all of the plot may be revealed yet). It's something of a canon AU, with the same cast of characters as the original comic, but set in a sci-fi future on an ice planet, not a post-apocalypse fantasy adventure. AO3 is currently handling its tag as synonymous with SSSS.

I think I'd prefer it to be handled seperately because the setup is so different, and some of the characters are in very different roles dependent on the circumstances, and (according to the creator), prior knowledge of SSSS canon is not necessary for understanding CoH, but at the same time the cast is the same... which is to say, I'll go with whatever the consensus is when nominations start.