Okay, so this is interesting.
I can't seem to find any problems with version 1.0.98. For the record, http://steamcommunity.com/app/218410/discussions/1/864973124131181945/. Basically, extreme battles were crashing for some reason. Just extreme battles, and only in 1.0.98 on Steam.
So, looking at the steam build I have locally, it seems to play totally fine for me. I can't find any missing files and I can't get extreme battles to crash. My guess is this means that what got uploaded to Steam is different than what I'm running locally. However, running the 1.0.98 version of the game that I downloaded via Steam doesn't crash either... this is starting to get downright mysterious.
So, a few sanity questions:
1) Is anybody running the DRM-Free build of 1.0.98 also experiencing this bug?
2) I'm about to re-upload the Steam 1.0.98 build to test_public. Can anyone test that and confirm whether the bug is still present?