Episode 25 is presumably going to be the final episode. On pareon they're working on a season 1 demo. I think the plan is to get the demo up & ready and then fix everything from episodes 1-24 then release the final episode.
We are re-doing episodes 1-10 for Steam season 1. (episodes 1-8 completed, so just finishing off the last two). Once that's done, we will finish episode 25 (last episode).
