Out of this Dimension (Star Fox)
We’ve discussed this bizarre level before, but it bears repeating: there is nothing else in the Star Fox series quite like the Out of this Dimension side quest/alternate ending/eternal damnation. From its arrival method, via a giant origami bird, to the boss battle against a slot machine (perhaps a social commentary on the inherent risks of gambling?) it’s unlikely we will ever again see something quite so irreverent in the franchise.
It’s also worth shouting out the other hidden stage, the Awesome Black Hole, a less psychedelic but arguably eerier expanse of space where enemies drift aimlessly through the void. The implied awesomeness comes from the fact that you can use it to warp to later stages on the map, saving yourself a lot of time, but also leaving potentially dangerous enemies and bases behind, unchecked. A job half done is better than nothing, eh Fox?
