I really enjoyed the scenario; I haven't played with such interest in a long time.

It's moderately challenging and doesn't go overboard.
During a battle with a demon hero, I found a bug: when controlling Cerberuses, the AI breaks and simply has all units use the "Wait" command.
Added:
Update Small fix to v1.2.1:
- Fixed a bug in the battle with the Demon Lord at the Gate, where all his units would go into defense after the player controlled one of the Inferno stacks.
The topic header has also been changed (I'm subtly reminding you of point 3 in the "Warnings" section). The download link remains the same.