The original Underworlds pioneered much of what today is known as 'sandbox' gameplay: instead of scripting a path on rails, players had the freedom to experiment and find their own path forward.More modern games such as Deus Ex and Skyrim have taken up the banner of sandbox play. Considering the span of years since Underworld was released, the banner has been carried forward less so than one might have expected. With Underworld Ascendant our aim is to take sandbox play to a whole new level, beyond the current generation of games.Making this all happen is the Improvisation Engine, which provides an array of sophisticated technologies for unleashing player creativity.