Descenders is a gnarly, procedurally-generated downhill mountain bike adrenaline-fest.
Frankly, it's about time. The last mountain bike game of any real note was Downhill Domination back in 2003, so for all intents and purposes Descenders is in virgin territory.
The concept doesn't need much explaining - throw yourself downhill along twisting, turning and occasionally lethal tracks littered with obstacles like jumps, loop-the-loops and the occasional castle. The tracks, being procedurally-generated, will be different every time you play, but the physics governing you, your bike and the track are punishingly consistent. You'll be grateful you're not earning those crashes in real life...
Your team is your life - choose to play as Enemy, Arboreal or Kinetic and you'll find yourself aligned with the other players who choose the same side. You can bring them glory, or you can literally drag their name through the mud.