Lemma is an immersive first-person parkour game where Every parkour move has the potential to modify the environment.   The futuristic environments are great to clamber about, with voxel based graphics, floating platforms and surfaces that pop in and out of existence at will.  It feels a lot like a futuristic sci-fi Mirrors Edge (though not quite as fluid yet), so if you can’t wait for Mirrors Edge 2 to come out, give Lemma a go!

You can visit their Steam Greenlight concept page HERE

Update: Alpha no longer available