'''''X-Men: Children of the Atom''''' is the beginning mark for the VideoGame/MarvelVsCapcom series.

Sometime around 1994, Creator/{{Capcom}} gained the rights to make video games based on the heroes of Creator/MarvelComics, starting with VideoGame/XMenMutantApocalypse for the UsefulNotes/SuperNintendo. This being the early 90's, with ''Franchise/StreetFighter'' mania in full swing, they decided to start with a FightingGame using the Comicbook/{{X-Men}}.

The game had six of the X-Men (ComicBook/{{Cyclops}}, ComicBook/{{Wolverine}}, ComicBook/{{Psylocke}}, Iceman, Colossus, and ComicBook/{{Storm}}) and four of their enemies (Silver Samurai, Omega Red, Spiral, and a Sentinel) taking each other on in a series of one-on-one battles, before fighting their way through the Juggernaut and facing SelfDemonstrating/{{Magneto}} in a final showdown. Akuma, from ''[[VideoGame/StreetFighterII Super Street Fighter II Turbo]]'', makes an appearance as a GuestFighter SecretCharacter, thus paving the way for the eventual coming of VideoGame/CapcomVsWhatever.

The game featured a unique exaggerated and animesque style accompanied by massive screen-blasting [[LimitBreak Super Combos]] and the ultra-high jumps needed to avoid them.

Naturally, the game was a hit, and it was followed in 1995 with '''VideoGame/MarvelSuperHeroes'''.
!This game shows examples of:
* AdaptationalHeroism: Colossus was actually a member of Magneto's Acolytes at the point in time in the comics when this game was released, and while the game's code shows references to this story arc were originally going to be included (he was going to have the option of choosing whether or not to join up with Magneto, apparently) they were ultimately DummiedOut and he decisively rejects Magneto in the final product.
* AnIcePerson: Iceman.
** Also Storm in some of her attacks.
* AscendedExtra: Sentinel.
* AttractMode
* BarrierWarrior: One of Magneto's most frustrating moves. He can erect an electromagnetic barrier at will which makes him completely invulnerable.
* BigBad: Magneto.
** TheDragon: Juggernaut.
* BloodKnight: Akuma
* BlowYouAway: Storm uses wind attacks as a few of her specials, and combines it with AnIcePerson for one of her Supers.
* CallingYourAttacks:
** '''''[[MemeticMutation BEHOLD!]]''''' '''''[[Comicbook/{{X-Men}} OPTIC BLAST!]]'''''
* TheCameo: Several:
** The Acolytes Exodus, Delgado and the Kleinstock brothers Sven and Harlan all cameo in every character's ending. A fifth Acolyte, Anne-Marie, was to be included too, but she was DummiedOut for reasons unknown.
** Forge cameos in Storm's ending.
** Jean Grey cameos in Cyclops's and Wolverine's endings.
** Mojo cameos in Spiral's ending and as an ice sculpture in Iceman's ending.
** Professor X cameos directly in Colossus's ending, as well as appearing as the last sprite in the credits roll.
* CombatTentacles: Omega Red
* DeathOrGloryAttack: Storm's Hailstorm Super.
* EverythingsBetterWithDinosaurs: In Wolverine's stage, Savage Land.
* GratuitousNinja: Psylocke
* GuestFighter: [[Franchise/StreetFighter Akuma]], as a SecretCharacter.
* HighlyVisibleNinja: Psylocke again. Silver Samurai's stage also has background ninjas in bright purple that periodically SmokeOut.
* HumongousMecha: Sentinel.
* ImmuneToFlinching: Juggernaut in this game won't flinch unless struck by a barrage of blows or a particularly powerful one. This may very well be the TropeCodifier of this concept in fighting games, or at least where it started to get popularized.
* JigglePhysics: Psylocke is quite bouncy.
* KatanasAreJustBetter: Silver Samurai.
* LadyMacbeth: Spiral's ending sees her talk Mojo into launching a new show, "[[AlienInvasion The Fall of Earth]]".
* LifeDrain: Omega Red could drain the health or super meter of an opponent, doing so would refill his health/super meter.
* LightningBruiser: Sentinel, especially when flying.
* MacGuffin: As usual, Omega Red is hunting for the Carbonadum Synthesizer to stabilize his mutant death factor. His ending has him find it laying hilariously out in the open in a random Avalon hallway.
* MythologyGag: Mojo makes a joke about [[VideoGame/XMen2CloneWars cloning everyone]] in Spiral's ending.
* PragmaticAdaptation: ''Children of the Atom's'' storyline is a LighterAndSofter retelling of the ''[[http://marvel.com/comics/events/249/fatal_attractions Fatal Attractions]]'' story, reusing its basic premise and adding in a throwaway line in the manual about Magneto recruiting mutant villains to justify the presence of characters like Omega Red and the Juggernaut.
* PunchClockVillain: Spiral references this trope directly in her ending, telling Magneto it's NothingPersonal and that she's just doing her job. Is it her fault she enjoys it?
* RocketPunch: Sentinel. It even says those two words.
* ShockAndAwe: Storm's primary form of offense, as well as several of Silver Samurai's attacks.
* {{Shotoclone}}: Cyclops.
* ShoutOut: Check [[ShoutOut/CapcomVsWhatever the page]].
* SNKBoss: '''Magneto'''. His AI is complete bullshit and seeks to royally piss you off at the worst time possible. He can fly away well out of your characters' reach and assault them with an extremely fast, damaging projectile. He has another move where he sends in four magnetic balls that are ''unblockable'' and home in on you, and when he catches them he can do whatever he wants. His super hits off-the-ground and unlike in other games reaches the top of the screen vertically, plus does ridiculous damage and it's very hard to avoid it. He's really fast, does a ton of damage with just a few blows, he is really difficult to get inside of and just has everything.
** PuzzleBoss: Then again, if you study him long enough, you will notice that he always follow a strict pattern which you can exploit.
* SpaceBase: Avalon, Magneto's space station and stage for the FinalBoss fight with him. It was a pretty revolutionary stage for its day too, cycling through four different backgrounds to represent Magneto pulling the battlefield into different levels of Avalon.
* {{Stripperiffic}}: In the ladies' side, we have Psylocke. And in the men's side, if one is feeling crazy, [[HuskyRusskie Colossus]].
* SurprisinglyGoodEnglish: All the characters save Silver Samurai are voiced by native English speakers.
** In fact, most of them have their [[WesternAnimation/{{X-Men}} Animated Series]] voice actors.
* TurnsRed: Juggernaut's super.
* WhenAllYouHaveIsAHammer: Many of Cyclops' moves (in this game and the later ones he appears in) are basically various forms of optic blasts.
* WolverineClaws: Wolverine, duh.
* ZerothLawRebellion: In Sentinel's ending in ''X-Men: Children of the Atom'', [[spoiler:after defeating Magneto, Sentinel returns to earth. Then, the complete Sentinel line is activated and they start to wipe all the mutants on earth. After the success of the mission... they [[KillEmAll start wiping out humanity]]!]]