I tabletop very intensely a few times a year, and my current campaign, Practical Magic: A Beginners Guide to Manipulating the Universe is going to have it's third session tomorrow night. I've also done classic D&D, from the 2nd Edition up to the current 5E. (which is SUUUUUUPER easy for beginners to pick up, I might add.)
The last game that I ran, Dark Water, was the story of a group of scientists and deep-sea operations crew of various flavors exploring an ancient temple at the bottom of a newly formed ocean trench, with much of the game taking place inside a pressurized submarine habitat (That I modeled in minecraft) , much like the Michael Crichton novel, Sphere. The crew retrieve several artifacts from the temple, and things quickly turned supernaturally spooky. To increase the atmosphere of the game, I played ambient submarine creaks, ocean noises of various kinds, and blacked out the lights when the habitat lost power, forcing them to use flashlights, scraps of paper and cellphone timers to keep track of how much oxygen they had left.
A few unexplainable events (and psychotic episodes) later, a bunch of people are dead, a few are crazy, and a Lovecraftian horror was headed to the surface to sow chaos until it gets nuked or something.
What was your latest adventure 8bit?