
(of course check also ingame vids from related)
Well, after a bit of googling I found out that it was freely downloadable: http://d3company.com/forum/viewtopic.php?t=857
Also the source code is available for free.
It's really cool feeling to fly with a wing suit through canyons, also the first person camera looks really cool . Of course the suits, parachutes etc. are skinnable, and I also think there's a mission editor but I haven't got around to it yet. One big minus is the lack of multiplayer but I think someone on the forums is developing the game further.
I know I'm not much of an advertiser and just got this game yesterday, but I highly suggest you to try it out.
Here's a link to one useful forum: http://www.flokas.de/baseforum/