Before I left on holiday, I was reading through Geoffrey McKinney’s Carcosa and wondering what in the world I would do with it if I were running the game with my own group. It’s a dark, bizarre, fascinating mashup of odd subgenres. Carcosa squashes together: Sword & Planet adventure (think Barsoom, say) The Lovecraftian Cthulhu Mythos a dash of gonzo neo-Lost World (in the form of mutant dinosaurs) the classic grey alien and alien tech … and those are just the mos prominent components. There’s also funky dice mechanics, a boiled-down-to-usability version of psionics, an alternate (and very creepy) magic system, and more. Which …