19. Bionic Commando: Rearmed
There's old-schol and then there's Rearmed, which is essentially a hardcore platformer without a jump button. As the level design gets progressively more and more devious, you'll need to master the intracies of using just a grappling to get around; no small feat, but it's great when you finally hit that stride. Though you could really just play it solely for Simon Viklund's sountrack.