Why do my biological sensor blips fade out so quickly, and why is my tactical flashlight adjusted to point 2 feet ahead at the floor!? Their gear must be stocked by the lowest bidder :(
To get the survival mode badge fairly easily, stand in the corner. No enemies spawn on the edges. Just hold the down arrow, and wait for loot to pile up in good quantity... when you see a heart or two drop in a pile of loot, wait for an opening, dash in, stab everything that might be there, and dash back to the kitty corner. You should only lose 1 heart at most each time, with the chance of either gaining health back if there were hearts there. I found that standing in the absolute left or rightmost edge made my kitty prone to fits of disobedience, so I ended up standing a few nudges away from the edge.
Sooo, I had a few seconds left to get to the gatekeeper, so I ran up to him, the doors closed and I got trapped in the gatekeeper room with all party members trapped outside. I spent pretty much all my potions keeping myself alive but was able to beat him. The door to my party was still locked so I went down the stairs, which resulted in the game getting stuck while trying to perpetually move Sam et al. through the locked door
Oh boy, I knew that timer door was going to be trouble. It's coded so it can't close if anyone is standing on it but I didn't cover the case where the party gets separated by it (didn't expect you to get so spread out). I'll try to put together a 'fix' but it won't be elegant. I'm sorry that your game got stuck right at the end!
EDIT2: I have added code to magically open that door when the gatekeeper dies or you accept his deal. v1.91 (coming in a few minutes) will have that fix.
It's like duct tape for a website! :D