Silent Hill 2's Retro Alien Love
Game: Silent Hill 2
The UFO ending has been a recurring egg in most Silent Hill game, and was probably a welcome catharsis for the dev team at the end of every game.
Think about it: they'd just spent a year or more poring over a game in which faceless nurses are stabbing you with a scalpel, and meat puppet things are spraying acid from some orifice, all set to the metallic soundtrack of grinding buzzsaws. A goofy-ass ending probably saved a few Konami-ites from stepping out onto a ledge at some point.