Faith (Mirror's Edge) Versus Altair (Assassin's Creed)
In an alternate reality that combines both universes, Altair's ancestor has escaped confinement and is on the run. His experiences have given him abilities and skills comparable to Altair himself, but modern society's technology makes it much harder to disappear from his pursuers, so he must run.
At the same time, Faith is continuing her quest. The two happen to cross paths upon a roof, with both their respective enemies after them. They must navigate a metropolis involving fifty buildings of various size and shape. Scattered pipes and railings serve as the only connection between buildings, which can only hold one person at a time.
Which parkour will win this race for survival?