Played it: Hotline Miami
The interesting thing about Hotline Miami is it succeeds where many indie games fail: basically doing the same things as triple-A titles, only better and with complete self awareness.
It's also the best kind of challenging. Dying and retrying actually feels like part of the fun: providing an opportunity to refine your ability to dole out ultraviolence and the freedom to experiment with unlikely strategies.
Coupling fast-paced action with a bizarre plot that's explicitly made open to multiple interpretations, Hotline Miami manages to be a game that rewards both deep thought and off-the-cuff thrill-seeking.