It's good that Tiggy is still getting ideas for new NAB maps. Just as HiSpeed Remix features a train hurtling along an endless track, here we have a large industrial-style elevator hurtling up the side of a skyscraper! "Ascension is a PointBlast duel on an elevator platform hurdling upwards. Simple layout, but hopefully a fun arena", is how Tiggy described it - and that seems to cover it, basically.
So, an atmospheric venue for a one-on-one; it gets a bit noisy, and you never reach the top of course, but there's no other map remotely like it - so what are you waiting for...?