Finished the Slig Barracks without too much of a hassle. That now leaves 1 more gate. With the Block 4 secret area (17:18), something I've had happen once before is that the mines don't really 'disappear' after they go through an electric gate. They leave a shadow, and when you return to whichever screen they started, they respawn. I don't know what triggers it, but probably lucky that it didn't happen on this run. 0:00 - Disclaimer 0:18 - Block 3 11:35 - Block 4 Section 1 13:44 - Block 4 Section 2 18:31 - War Room