I've been playing for a few days. At first everything was very smooth. Then game started to lag, and now starting late yesterday, it shuts my computer off out of the blue. Just bam - no power. It sounds like a similar issue from the first game: https://forums.obsidian.net/topic/72006-shuts-down-computer/page-1 It doesn't seem to be an overheating issue - it recently shut the computer down as soon as I loaded the game; other times I can play for a couple of hours or more. Forum isn't letting me upload the save game file, but I'm attaching the output log and specs.