I was on the final stage. Made sure to kill off both of my other heroes before leaving round 1 and progressed to killing Jezebel with just one character alive and I did not get the achievement. I'm wondering if there's some other requisite I'm missing? Certain final boss? A particular Ascension level? Thoughts?...

So my first 4 runs all completed without any trouble. I didn't just win, but rather completely dominated the game to the point where it wasn't even remotely close. I pretty much never used the rook either, I like things to be perfect. The 4th run I finally started using him a little bit and it just became even easier. The game is pretty much broken right now and it's not even remotely challenging. I will say, it is very very fun, just need to make it somewhat challenging. I'm definitely better than the a...

Am I the only one having a random crash happening when ending my turn ? This kills my runs as once the crash happened on one turn it always happens when reloading the game... I don't know how to troubleshoot the problem, sometimes using enter instead of the end turn button takes me past it, sometimes it does not... That's really anoying :/ Edit : disabling full screen mode / changing resolution to a classic 16:9 ratio got me past the crash, this might help you save your run ! :)...

What conditions void it?: A: End of wave upgrades to the 'wrong' hero. (including the Rook?) B: After-battle level-up upgrades to the 'wrong' hero. C: After-battle shop upgrades to the Rook. D: After-battle shop upgrades to Towers or Contraptions. My impression is A, but it might be some of the others as well and don't want to mess up....

Because it only works on the first spell, it forces you to wait on spells until you can really use the strongest one. I might have better options to use a level 1 spell, but then end up forced waiting because casting that first would not be efficient. Rook is superior stats and far more durable. It could work if it's a manual use ability so we can cast tier 1 and 2 spells, then later cast 2 x tier 3....