This is what a rationalised 21st century dungeoncrawling RPG can look like – enough old school aspects to appeal to grognards, but with enough mechanical crunch to appeal to new(er) school players. The systems maths is robust enough that it doesn’t fall to pieces if you breathe on it, but simple enough that you only need to do simple-addition-up-to-20 in play. And we did it crowdfunded and with substantiative fan base interaction and customer feedback.