I'm currently playing on Linux 64bit and my relevant system bits are here: https://gist.github.com/JamesChristie/409c87b7821d338654f5 I'm fully willing to acknowledge that this might not be a bug and might simply be my own doing in some fashion; apologies in advance if that is the case. Please let me know if there is anything else I can do to provide context or additional, helpful information. There is some additional perspective here: http://steamcommunity.com/app/230190/discussions/0/615085406669812763/ The core takeaway: I can copy the dungeon layout *precisely* from videos of people beating the mission Attempted defense layouts have included a full two rows of cannons (all in range of mobs at choke) behind a choke point of blade lotuses covered by the aura of up to three garrison props (cannons are in overload and sustained by garrison healing) Choke points, whether three or with left/middle merged into one via replacement earth, die near instantly without constant and focused spell repairs Even with constant support, defense are eventually demolished by, at the latest, the point where the 180 kill mark is hit. Once 3 lvl 4/5 dwarves reach the blade lotus, it is impossible to keep it alive, even ignoring all other defenses and functions. Constant rebuilding of defenses is a must. Once the 180 kill count is reached, a tunnel (apparently new as of this patch?) dumps 10-15 level 8 troops directly onto the core to be defended. Even marshaling every single minion to this point to fight ahead of time, they are rapidly massacred. As with the steam thread, I understand this is meant to be a difficult mission, but after three days of attempts, (many of which near perfectly mimic strategies outlined in videos showing victory or laid out in text from other players) I have come nowhere close to being able to save the other core, much less my own. That is indicative to me of something being off; not that I mean to make myself sound like the greatest strategy gamer in the world. That level of difficulty seems well above anything that has thus-far been indicated by the game or that is reasonable in a general context. The challenge I am currently encountering seems to be far and above anything else I've hit in the game, even with skirmishes with high-difficulty AI. Without a truly gross and fundamental misunderstanding of the mechanics of the game, the current situation seems impossible. The crux of the problem seems to be incoming damage that cannot be received sustainably by anything, and a large group of lvl 8 troops that can't be defeated even with a sizable force of all dungeon minions at once including around 5-8 corrupted dwarves (or whatever my succubi and I can manage while trying to keep defenses from dying). Addendum: I have not been able to play the mission without the 1.1 patch as the test patch fixes some crashing and performance issues that otherwise make it unplayable. I wish that was not the case, but I don't have a bare-metal Windows install anywhere to play a different version of the game that might run at that patch level.