Parkour with one instruction: keep going up. The city is built as a climbing frame — ledges, ladders, poles, scaffolding, gaps to crawl through, ziplines to cross on — and the route is never marked, so reading the next three moves off the skyline is the actual skill. Stamina limits how long a sequence can be before you have to find somewhere to stand. There is a story mode, pure parkour runs, and a climb-and-jump mode that strips out everything but the ascent.