
Umbral Flare
The problem with Shadowrun is that the rules are too broad, encompassing everything that anyone could possibly want to do in that world, and the result is that it takes forever to get anything done.
Umbral Flare is the solution to that problem, with rules streamlined rules to get through an entire dungeon in just 3-4 hours, even when that means half a dozen battles to the death against guards, monsters, and mecha.