Annotated playthrough of Gimmick!, an obscure NES game. First of four parts embedded below, link goes to playlist with all four.

The author of the annotated video makes some great points along the lines of "more games should do this." Gimmick! itself looks insanely difficult, and seems to violate some fairness laws, not the least of which is you can complete the entire game and get a downbeat ending that doesn't resolve the story introduced by the opening sequence. The only way to complete the story is to find several extremely difficult secret rooms. The walkthrough above shows the happy ending; here is the sad ending (by a different guy, narrated).

(Via waxy.)