MTB Freeride:
Last version 0.42_beta, very raw.
Why not aviable old map?
0.4 is prototype of multiplayer. So it contain only simple track for chalenge.
0.42 have also prototype of the track constructor.
You can download old version.
Press "Install game", and next "download direct". This is zipped old 0.3 version.
You can see video of game play HERE, HERE and HERE.
Download:
You can install via Desura HERE You'll find the developers site HERE