I came across this group and thought they maybe interested in the Witness worldbuilding exercise, and vice versa About
And gaming for example Ecopolicy - Willkommen auf der Homepage von Prof. Frederic Vester. Hier finden Sie seine wegweisenden Arbeiten und Werkzeuge zum Vernetzten Denken: das Sensitivitätsmodell Prof. Vester® und das Computersimulationsspiel ecopolicy®. and Systems Thinking Ontario - 2017-02-15 (these were suggested by a participant in the Witness game today)
Maybe you know several other such initiatives already?