''VideoGame/{{Rayman}}'' has several examples of NightmareFuel, notably most of them in the [[DarkerAndEdgier second game.]]

* [[IDontLikeTheSoundOfThatPlace The Cave of Bad Dreams]]. The cave itself is made from nightmarishly grotesque faces, for most of the level, you're riding on skulls across what's pretty much the river Styx. Next you have these wooden claw-like things that sweep out at intervals on the wall, if you get caught by one, it slams Rayman around before dragging him into its hole, where he loses some health and respawns. Next up, we get the mini-guardians, these things aren't much of a threat on their own, but if they get close enough to Rayman, they'll swallow him whole and alive for hp loss and a respawn. At the very end of the cave, the Guardian arrives and attempts to eat Rayman, the camera switches to ShakyPOVCam of his mouth as you attempt to escape him on a slide.
* The Tomb of the Ancients. There are skeletons everywhere, the wall design is very similar to the Cave of Bad Dreams, and it has another river Styx boat ride This time you have to fend off zombie chickens on a very small barrel; once you get to the end of that area, you find a pitfall. The tempo of the music changes to PsychoStrings after you get down to the bottom, at a tempo played to simulate something skittering towards you from the darkness, right before a GiantSpider attacks you. [[http://www.youtube.com/watch?v=KF8d8I9n-2s The music]].
* Most of The Desert Of The Knaaren from the third game. The top is eyebrow-raising enough, with a land of lava and acid pools, but once you fall underground OHHH BOY. It's not just the fact that the place is completely dark and filled with skulls. The Teensies warn you that the Knareen are invincible, [[ThisIsGonnaSuck they are not joking]]. The Knareen are the scariest enemies in the entire series, being COMPLETELY INVINCIBLE and forcing you to sneak past them, being shrouded in hoods and having strange inhuman growls, and constantly screaming to devour Rayman.
* Most of "Swimming with Stars" in Rayman Origins since it's the first level that isn't whimsical and cheery like everything else up to that point. If the creepy enemies didn't get you, then the oppressive darkness and [[http://hosting.raymanpc.com/raytunes/music/077%20-%20Sea%20of%20Serendipity%20~%20The%20Abyss.mp3 haunting music]] will.
** Also, the music of the swimming levels in general. For the most part, it's ridiculously cheerful. However, for one reason or another, the creator of the music apparently thought that it would be a good idea to include what sounds like one of the singers ''drowning while singing''. And try to [[PlayedForLaughs play it for laughs]], even.
** [[spoiler: Some of The Magician's comments when you bop his top hat foreshadow his villainous qualities, or at least that he's not nearly as nice as other characters.]]

* The boss of Olympus Maximus in Rayman Legends. [[spoiler: It's a giant floating cloud of the Dark Creatures from previous levels, which shape into the form of [[GiantHandsOfDoom a giant hand,]] two flying demons, and then a ''giant floating demon.'' The music is also very dark and low key, unlike most of the music in the game. It's just too bad that it's a very easy boss.]]
** Heck the [[GoddamnedBats little]] [[DemonicSpiders fuzzballs]] themselves. They follow whatever direction your going and there are sections you have to lure them into pits just to continue.