Our innovative game system requires a single d20 to play, a pencil, and something that acts like a calculator (there is after all, an app for that) and a sheet of graph paper usually helps.
The wild part of all this, is that all of the Core packs are designed to be played interchangeably. If you want to have a sci-fi campaign with magic, use Space Rage and Medieval Rage. If you want magic and the modern world you can use War Rage and Medieval Rage. You can run all three at the same time!