I found it odd since there's no tropes about the character's alternate universe counterpart dies. So I made this one.
In an alternate where the main character traveled to an Alternate Universe. He later found out that his Alternate Universe counterpart was dead. Of course, this trope doesn't require the character found out his alternate counterpart is dead.
Compare/Contrast to Death by Adaptation, where the character died from adaptation instead of his alternate counterpart.
Not related to Retgone.
In Dragon Ball, both Goku contract a Heart Virus. Unfortunately for Future Goku, he dies from a heart virus. Later, most Z fighter from alternate timeline are killed except Future Gohan by Android 17 and 18. Future Gohan gets killed thirteen years later.
Inverted in Fairy Tail Edolas Arc, with Mirajane and Elfman's Dead Little Sister Lisanna, as Earthland's (the main setting) version of Lisanna is dead, but the Edolas version is alive. turns out to be played straight later, as Edolas Lisanna really is Earthland Lisanna who was transported into Edolas, while the real Edolas Lisanna is already dead.
In JLA-Avengers issue 3 the Marvel and DC worlds have become combined, turning it into a Silver Age utopia. When the characters learn how their realities are supposed to be, the character who argues for the restoration the most is Hal Jordan - who is "supposed to" be dead. (Barry Allen is there too, but he's not quite so eager to restore the realities.)
In Astonishing X-Men there's an alternate universe in which hundreds of alternates of the X-Men the readers know have been killed for an arguably greater good.
Spider-Men sees the Peter Parker of Earth-616 trapped on Earth-1610, with his counterpart having recently died.
In The Talisman, if you have an Alternate Self in "The Territories", you can flip into their mind when you travel between worlds. But if you don't, like Jacky, whose Twinner was murdered as a child, you remain yourself.
[[folder:Live Action TV]]
Inverted in Doctor Who, Rose Tyler's dad is dead in Universe X, but in Universe Y he's alive. Rose, however, doesn't have an alternate universe counterpart (though her mother's dog is named Rose... she must like the name).
Also in Doctor Who, the Mickey Smith (Ricky) in Universe Y is dead, with Mickey Smith in Universe X remaining alive.
Star Trek: The Next Generation: Tasha Yar from the reality where the Enterprise-B fell into a wormhole learns that in the soon-to-be-restored reality she was killed, she volunteers to go back through to help the B crew.
In the Star Trek: Voyager episode "Deadlock" the 'real' Harry Kim and Naomi Wildman are killed, and replaced with duplicates from another Voyager (coming across a space-time rift) which self-destructs [[Taking You with Me taking out some alien invade
Inverted in Fringe and arguably its most important plot point: it is in fact the "main" universe's Peter who dies as a kid. This sets the plot in motion as his father, Walter, goes on a journey to the alternate universe to steal back his sick yet not dead son from his alternate self and cure him like he should have done.
Stargate SG-1 did this in some form for nearly every alternate universe they ran across.
"There But For the Grace of God": The alternate Daniel Jackson never joined the stargate program and died in a Goa'uld orbital bombardment of Egypt. Alt!Hammond subsequently died defending the SGC, Alt!O'Neill was killed trying to talk Alt!Teal'c into a Mook-Face Turn, and Alt!Carter blew herself up to keep a piece of phlebotinum out of Goa'uld hands. Alt!Teal'c died when the base self-destructed.
"Point of View": The alternate Jack O'Neill was killed in action defending his SGC from a Goa'uld ground offensive, and Alt!Teal'c died when Prime!Teal'c shot him. Inverted with Maj. Charles Kawalsky, who was alive in the alternate universe but dead in the prime timeline. We also see several alternate universes where the Goa'uld were patrolling the SGC; presumably none of the cast survived.
"Ripple Effect": Inverted. Among the alternate SG-1's that showed up we had at least two characters who were dead in the prime timeline: Martouf, a Tok'ra operative who died in "Divide and Conquer," and Maj. Dr. Janet Fraiser, who was killed by a stray staff blast in "Heroes, Part 2."
In Red Dwarf, Arnold Rimmer might technically be this to Ace Rimmer, having died in a nuclear accident and been brought back as a hologram in the pilot. Though in Ace's second appearance he's dying and attempting to convince Arnold to continue his dimension-hopping heroics.
In Ace's second appearance he turned out to be the latest in a long series of alternate Rimmer's who took up the mantle, so many that his predecessor's holo-bees comprise a Saturn-like planetary ring.
At the beginning of Chrono Cross, Serge finds himself transported to an alternate universe where he died ten years ago.
At the end of Sam & Max: The Devil's Playhouse, Max had died and it is impossible to revive him. Fortunately, a Max from a parallel universe shows up to befriend Sam, explaining that his Sam had similarly died.
Episode 7 of Umineko no Naku Koro ni revolves around a new character named Lion discovering his/her alternate self Beatrice who dies tragically in every single timeline other than his/her own
Inverted with Retrope in TV Tropes The Webcomic: she was killed in all known alternate universes but resurrected later in the Prime (and only in the Prime).
Homestuck features a ridiculous amount of dead alternate selves for nearly every character that has been introduced so far. This is due to the rules that characterise SBURB: the only successful way to beat the game is, supposedly, following the socalled "alpha timeline", and the game (or rather, the possibly sentient entity called Paradox Space) will eventually punish whoever makes a choice that is different from what's predetermined in the alpha timeline, thus generating a "doomed" timeline in which failure is the only option. Dead alternate selves are also an important part of the plot, as players have access to where they reside in the afterlife, the "dream bubbles", through various means and they usually aid the players and at times even influence the plot in a significant way.
Other than doomed selves, one could also consider guardians to be actually alternate selves, since they are literally the same characters but with their roles switched (for instance, grandfather and grandson, or ancestor and descendant, or even older and younger bro). And guess what, "alternate me is dead" is true for each and every one of their kids version. In every universe so far.
Being a Time player, Dave has the power to go back and forth in time. When the Draconian Dignitary steals his copies of Rose's Journals from his room, he considers the idea to go back in time and stop the thief, only to discard the idea after noticing the corpse of his doomed timeline self lying on the floor of his very room, proof that he has actually already tried that.
In Alternate Universe #114 in Goblins, Forgath, Complains and Big-Ears were killed during the battle at the goblin warcamp, while One-Eye (a minor character who died in the same battle in the main universe) survived and became an adventurer working alongside Minmax.
In Ben 10: Alien Force, where Gwen goes back to time and prevent Kevin's mutation, it creates an alternate timeline where Gwen is killed by Charmcaster.
Justice League had "A Better World", where the League turned into an authoritarian group that controlled the world. When looking for leads about this world, they find out that their Flash was killed in a shooting in their time, forcing the others to this style. Once he found this out, he capitalized on this to break free from their control and get the others out as well.
Five hats means that five tropers think it is ready to publish.
You are saying that you think this draft is ready to be published. That means the description is not ambiguous,
it doesn't duplicate an existing trope, there are at least three examples, and the title makes sense.
Is that what you meant to do?
You are saying this draft has a ready-to-publish hat it does not deserve and you are taking it back.