[[caption-width-right:288:[[NothingIsTheSameAnymore Trust us, this is pretty accurate in describing what this event did to the Ultimate Universe.]]]]
->''I donít think anything quite sums it up like the fact that ''Ultimatum'' is a comic that doesnít have an ultimatum in it. Like the series itself, itís just something that someone thought sounded cool, and the more you think about it, the worse it gets.''
-->--'''Chris Sims''', [[http://comicsalliance.com/worst-of-the-worst-ultimatum/ "Worst of the Worst"]]

It started off as a simple task. The ComicBook/UltimateMarvel universe, originally created to appeal to new readers [[AdaptationDistillation without fear of years]] of BackStory or {{Retcon}}, had begun to stagnate. Sales had lowered and some series, such as ''ComicBook/UltimateXMen'' and ''ComicBook/UltimateFantasticFour'', had fallen into SeasonalRot. So the powers behind Marvel came up with a plan to renew reader interest by means of a CrisisCrossover, a WhamEpisode which would bring all the characters of the Ultimate Marvel universe and shake up the status quo to make a new jumping on point for new readers, written by Creator/JephLoeb.

It starts with SelfDemonstrating/{{Magneto}} stealing [[ComicBook/TheMightyThor Thor]]'s hammer, swearing to avenge his children's deaths at the hands of the Ultimates, and he uses its powers to flood New York and cause catastrophic natural disasters around the world. And then, well, [[FromBadToWorse things pretty much go downhill from there]]. The series lasted for 5 issues (January - September, 2009).
!!''Ultimatum'' contains examples of:

* AlwaysSaveTheGirl: Subverted in the ''Fantastic Four'' section. Reed prioritizes stopping Doom over saving Sue, leaving Ben to help her. She is ''not'' happy once she's better.
* AnyoneCanDie: And we mean '''ANYONE'''. Although it turned out that DeathIsCheap in a handful of cases, most of the characters that died in this miniseries were permanently put down for the count. [[http://marvel.wikia.com/Ultimatum Here's a full list of deaths.]]
** Apparently, the initial thought was that ''Ultimatum'' would serve as a reboot for the entire Ultimates universe. It turned out to not be the case, so the universe had to deal with with the aftermath.
* ArtisticLicenseLaw: In the aftermath, the U.S. government creates and passes a law rendering just ''being'' a Mutant illegal, to the extent anyone found being a mutant is arrested without trial. In other words, a bill of attainder, which are meant to be forbidden.
* ArtisticLicensePhysics: Reed gives two explanations for how Magneto caused the tidal wave. Either he reversed the earth's magnetic poles (which wouldn't have much effect) or he reversed the axis (which he would have no power to do). Some have speculated that he could have caused the tectonic shifts necessary to create a tidal wave by moving large metal reserves in the earth's crust, but this is never stated in the story.
* CrisisCrossover: The first major one for the entire Ultimate Marvel line.
* DarkerAndEdgier: The violence in this series is cranked to an all-time high, and nobody comes out of the catastrophe unchanged.
* DisneyDeath:
** [[spoiler:Spider-Man manages to survive his near-death experience, presumably because Bendis didn't want him killed off.]]
** [[spoiler:Valkyrie and Captain America too, being resurrected by Thor's sacrifice.]]
* DisproportionateRetribution: The reason why Magneto caused the apocalypse was to get back at the Ultimates for the deaths of his children. Bit of an overreaction there, dude. It should further be noted that he was ''horribly, horribly'' abusive to said children, to the point of ''crippling'' his son at one point just for siding against him, further adding to his hypocrisy.
* DoesThisRemindYouOfAnything: It probably isn't a coincidence that when [[spoiler:Cyclops is killed]], the only two X-Men arrested are the black woman and the gay Russian.
* DownerEnding: [[spoiler:Various heroes are dead, the X-Men (what's left of them) and Fantastic Four disband, Quicksilver is working for a mysterious evil individual, and Mutants are even more discriminated against than they previously were.]]
* DroppedABridgeOnHim: Just about everyone who dies.
* {{Gorn}}: The comic is infamous for this: Blob devouring [[spoiler:Wasp's]] ripped guts, [[spoiler:Hank Pym]] getting blown up by suicide bomber Multiple Man, complete with flying guts and a skeleton being incinerated, [[spoiler:Doctor Strange]] getting squeezed by his own cape until his head graphically explodes, etc.
* HeroicSacrifice: Yellowjacket gathers the Madrox dupes suicide bombing the Triskellion and takes them out to sea to save the rest of the Ultimates.
* IdiotBall: Among the more glaring examples, the final issue has the X-Men going along with the U.S. government declaring mutants completely illegal, along with Jean and Rogue doing nothing to help Storm and Colossus when they're arrested.
* ImAHumanitarian: When ComicBook/{{Hawkeye}} finds [[spoiler:Wasp]]'s body, it's had a chunk bitten out of it by The Blob, who comments that it "{{tastes like chicken}}".
* InfantImmortality: Notably, the [[spoiler:mostly teenage cast of ''Ultimate Spider-Man'']] survives untouched, as do [[spoiler:the youngest members of the X-Men and all of the Fantastic Four]].
* KilledOffForReal: See directly below. But more specifically, [[spoiler:Professor X, Wolverine, and Magneto]] are gone, among many other really big names.
* KillEmAll: No kidding.
* MoodWhiplash: We go from the truly awesome moment of Cap and Thor fighting the hordes of the undead to the nauseating scene of [[spoiler:the Blob cannibalizing the Wasp]].
* MyGodWhatHaveIDone: Magneto has this after learning the truth about mutants [[spoiler: who in this universe are a result of genetic experimentation, leads to a brief VillainousBreakdown before Cyclops kills him with an optic blast.]]
* NeckSnap: How Magneto kills [[spoiler:Professor X]].
* RasputinianDeath:
** [[spoiler:Wolverine's]]; first almost all his soft tissue is blasted away, then his skeleton is torn apart, then the individual cells of his last remaining bones are destroyed.
** [[spoiler: Magneto]], as well. His hand is cut off by Valkyrie, Wolverine [[CurbStompBattle goes to town]] [[ExtremeMeleeRevenge on him]], and finally Cyclops disintegrates his head.
* RocksFallEveryoneDies: Could be the comic codifier. With the amount of ridiculous deaths, it starts to seem like someone at Marvel was using this as some sort of catharsis. [[note]]The most obvious candidate being Creator/JephLoeb, who was suffering from grief after the death of his son.[[/note]]
* SelectiveMagnetism: Magneto is seen somehow treating a bleeding wound using magnetism. Probably the best explanation (in that it wouldn't work, but sounds almost possible if you don't know) is that he's controlling the iron in blood.
* ShootTheDog: At the end, after hearing Reed talk about how much of a threat Dr. Doom is, Ben quietly goes to Latveria, kills Doom, and leaves.
* TastesLikeChicken: The Blob says this exact line [[spoiler:when he's eating the Wasp.]]
* TeamKiller: For some odd reason, Longshot, Forge, Detonator and Hard-Drive are among Magneto's victims despite [[AdaptationalVillainy being Brotherhood members.]] It can't even be excused as accidentally casualties in the wide-scale destruction as Mystique mentions having them captured and tortured in the Savage Lands.
* WhamEpisode: The entire exercise of the series was to shift everything around so much that the status quo could never return.
* WhatTheHellHero: Hawkeye gets a damn justified one on Captain America when he makes a snarky comment about Hank Pym's HeroicSacrifice.
* YourHeadASplode: [[spoiler: Dr. Strange's death.]]