As mentioned in the Buying thread, this game looks really promising for those who like being a truly stealthy ninja in the vein of the old Tenchu games.
The big main difference between this and Tenchu is that your character has some sort of shadow magic, so you can almost "paint" shadows into the world, turn invisible, teleport between them and other stuff. It seems like a really cool mechanic, but the zipping around does make me miss the grappling hook from Tenchu.
They just announced a release date of October 4th, with this launch date trailer
. It's coming to Steam for PC/Mac/Linux and to PS4 in downloadable form, or a special disc version for PS4.