Game locked up, unknown cause. I'll report as much as I can
Sunless desert 4/4 [66:35]
Seed: 63238708737
X:19 Y:20 T:1683, FPS:58
Necromancer, HP: 35/35 MP:1/7 FD:12/20 SP:2/2 experience bar shows 6 over 68%. Strength 10, Dexterity 10, Intelligence 14. None of this batch of monsters had yet reached the player character.
Equipped weapons are 8 damage red-blade ax which I hadn't used (I think it charges up for a heal effect) and a 10 damage enchanted +1poison wand (I believe the starting wand). I had a ring +1 SP and I think(?) a glove +1 defense. I also had an unused spell for blood portal, and an also unused skill (I think sprint) that could move me three squares.
I had recently opened the right glyph door releasing monsters on the right top and left. I had two summoned skeletons fighting green-and-yellow snakes on the right, they look like cobras. A green monster with large white chest and 47 health had also engaged my skeletons. I cast a 13 square poison cloud at the monsters on the left - these are yellow with a grey-claw-tip arm reaching up left - I think(?) they had wings but it's hard to see now through the poison cloud.
I remapped a lot of the keyboard keys, Q up left, W up, E up right, A left, S pass turn, D right, Z down left, X down, C down right. I had to remap a bunch of keys that conflicted with those key maps.
Sequence of events: I opened the glyph door then started running down left. The skeletons engaged the right side enemies. Running down left I cast poison cloud on the left side monsters. I think it either locked up right after poison cloud was cast, or it locked up when I tried running further down left. That's all the info that's either visible or that I can remember.
I speculate the issue is most likely related to the monsters fighting my skeletons, with the monsters in the poison cloud being an obvious secondary suspect.
P.S. On other minor note, on my run through I twice held back on spending a skill point. I saved a point to immediately buy poison cloud when Int reached 12, and I think I saved a point to immediately buy Poison cloud II when Int reached 14. I think an attribute potion helped me reach Int 14.