It took so much more work than I thought to get the game talking with Steam. But, it does now. There are 25 achievements so far, and they seem to be working. We can't test those directly during the Playtest (Steam rules, oddly). But, I have a private branch and things seem to be working really well there. Nice.
Soon, I'm going to start on a public demo. Playtesters have more access, but the demo will have achievements, and the whole thing will still be available to everyone even after the Playtest is done.