Downward [Steam, Official Site] is an extremely impressive and downright beautiful parkour game. Recently it left Early Access, but the Linux version was a bit behind, now it's not!
The full release has finished the story and it has multiple endings (three to be exact), which sounds pretty fun. I'm really looking forward to a full play-through, as I was completely mesmerised by it when I tried it out initially.
It's a game about exploration and adventure, with puzzles to solve, character upgrades and an environment that changes as you progress.
About the game
QuoteDownward will let you set off on humanity’s final adventure, to seek out an explanation for the apocalypse that changed the Earth as we know it.
Taking advantage of parkour techniques and of the mysterious "anomalies" you will traverse astonishing and dangerous ruins of past civilizations, all to find the legendary artifacts meant to control the deadly calamities that came to this world.
You won’t be alone in this, but what can you do? This world is not for humans anymore…