Based on the Heroic Interactive Theatre Revised Core Framework.
From the introduction:
Shaped by fantastical themes and terrifying chords, Al’se’war is a Gothic Colonial immersive theater game where your interactions as a character will affect and evolve our story. Your story.
Set in an ever-growing world, the level of your decisions – and their effects on the world – does not simply end there. Al'se'war is a game where creation of many things is possible; where you, the player, can craft anything – fighting techniques, new engineered devices, new magical spells, even new magic rituals.
Your creations will shape the very Ether itself, and all these things that you do or create will someday be added to this rule book. So, welcome, friend. Welcome to the new world known as Al'se'war.