Dwarf Fortress is one of my favorite video games of all time. During the lockdowns, I had a long (100+ years) and successful world save.
During the last fortress in that world, I did a couple of stupid tricks. First, I drained the magma sea and started cultivating crops on the drained seafloor. I made a Reddit post about that.
After that, I breached Hell and set up a fully demon-proof corridor on the Hell floor connecting two adamantine spires. I have a gameplay capture of the breach and the initial defence against the demon horde up on YouTube.
This post was retroactively compiled on 2024-01-19. The version of Dwarf Fortress depicted here is 0.47.05.