Downer Ending/Other Media

Fairy Tales
"I FOUND YOU!"
 * The Yellow Dwarf. The titular villain ends up murdering the hero, and the bereaved heroine dies of grief not long after.
 * Although it's gone through Disneyfication over the years, the original Little Red Riding Hood definitely falls under this: the little girl is devoured, rather messily, by the wolf, who gets off scott-free and wanders away. No brave hunter in this version, nope!
 * And this is literally the way Jin-Roh adapts the tale.
 * The original version of H. C. Anderson's The Little Mermaid. No happy ending for you.
 * While the title of the tale escapes me, there's a story about a princess who refuses to marry anyone who doesn't beat her at a three-day game of hide-and-seek. Anyone who challenges her but loses gets his head cut off. The protagonist wants to marry her, but isn't good at hiding. So he asks for the help of a djinn...then when he challenges the princess, on the first day the djinn turns into a fish and hides the man in his mouth. The princess doesn't find him. The second day, the djinn becomes a bird and hides the man under his wing; once again, the princess doesn't find him. On the third day, the djinn digs a hole under the princess's floorboards andhides the man there. The man listens to the princess magically search for him until the third day is nearly up, and is releived that he won't get beheaded...then the princess stomps her foot in tantrum and the floor breaks under her feet. She looks down the hole...

Fanfic

 * In the Naruto fanfiction the first half of canon New Blood written by J Falcon ends with konoha being taken over, sand destroyed and plenty of characters dead, turned traitors or their fates ambigious. So with a complete and total loss for the heroes.
 * Then it's seems to be getting better in the second half [It's not finished yet] but it still has plenty of beloved characters dying. Like Ryu who just died in one of the recent chapters, one of the most noble and unambigiously good characters [Despite working for Orochimaru]
 * A rare humorous example can be found in nearly everything written by Hans Von Hozel.
 * One of 3 endings in Dyl Man's What the Ed...?
 * The Gorillaz fanfic Just Over the Stars has one that has shades of a Bittersweet Ending but really leans more towards a Downer Ending:
 * Depending on how you interpret the epilogue, That Guy with the Glasses in Space has one of these, where, . At the very least, it leaves the reader a bit uncertain or worried about what happens after that.

Fan Works

 * The Star Trek: New Voyages episode has Chekhov afflicted with Rapid Aging which causes him to die at the end of the episode.

Tabletop Games

 * Though Vampire: The Masquerade ends with Gehenna, a vampire apocalypse, most of the potential Gehenna scenarios end on a suprisingly hopeful note. However, "The Crucible of God" scenario has three alternative endings, one of which is specifically intended for players who enjoy downers: "The Rest Is Silence" features the Antediluvians draining all life from the face of the planet in their respective quests for godhood; every single species on the planet is driven into extinction, leaving Earth completely barren and lifeless. The only survivors are the players, and now that humanity is dead as the rest of the world, they have nothing left to feed on except each other; from there, they either commit suicide via sunlight, or sink into Torpor for all eternity. For added misery points, the instructions suggest that this final decision should be made in the decaying remains of the Garden of Eden, the only safe haven from the Antediluvians' death-throes.
 * Warhammer 40,000: No matter how you look at it, the human race is screwed: The God-Emperor's life support is failing, the Necrons are waking up, the Orks are everywhere, the Eldar are dying/eaten by a God of Evil, Chaos can't be beaten as long as emotion still exists, and of course, the Tyranids will eat everything.