Sensei Games

I've been playing a lot of HOTLINE MIAMI recently and am absolutely in love with it.  It's hard as nails, but, like Super Meat Boy, gives little to no penalty for failure.  As a result, it's what I like to call a "sensei game."  It is structured to teach you to become a master.  It is extremely challenging, but it wants you to succeed and helps you to achieve success.