Game Theory: All Games are CONNECTED! | How Fortnite, Doom, and Kingdom Hearts Share a Universe
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Game Theory: All Games are CONNECTED! | How Fortnite, Doom, and Kingdom Hearts Share a Universe

August 26, 2019

Put that thing back where it came from, or so help me – *Door opening sound and intense rock music* 23 19! We have a 23 19! *Even more intense rock music and gunshots* Hello Internet, Welcome to Game Theory, where it’s been a good long while since I’ve made a nice connected universe theory. “What is this, a crossover episode?” Yes, Mr. Peanut Butter, that’s exactly what it is. Shared universes are big business these days, whether it’s ten years of Marvel come together for Infinity War, or Elsa sharing a universe with Sephiroth in Kingdom Hearts, everyone is competing for that coveted title of most ambitious crossover in history; but I think we can do ’em all one better. Last time I did one of these huge connected chain theories, we united most major Nintendo franchises out to the real world, and then back again to God of War. We also united all of the big Ubisoft franchises, but this time I think we can do one better by connecting one of gaming’s oldest, most popular titles to one of its newest most popular titles in a weird web that will have us spanning decades and developers to deliver some of the most diverse cameo potential possible. All while still remaining in canon. And that’s an important one. There are no PlayStation Royale or Smash Brothers-style crossovers here. These can’t just amount to toys in a box. Most ambitious crossover in history I hear you say? Hold my beer. And by ‘beer’, I mean ‘Diet Coke’, because beer is gross. Well, at least it will be the most ambitious crossover in history until Mr. Beast does his 100 Youtuber Battle Royale he’s talking about on Twitter. Sign me up for that one Sir Beast! Our journey today begins in the early 1990’s, when a company named ID Software began rolling out games in a genre that would eventually be called the first-person shooter. And of them all, none were bigger than Doom. The timeless tale of a Space Marine slaughtering mechanical brain spiders from H-E-double hockey sticks set the gold standard for PC games, and in just two years was installed on over 10 million computers. It was a game that was so influential that, before it was known as ‘the FPS genre’, it was known as ‘the Doom Clone genre.’ And sure, later this year the Doom-iverse is gonna get even bigger with the release of Doom Eternal: “We’re not just making a Doom game anymore, we’re building a Doom universe.” But the thing is, Bethesda, that universe is already more sprawling than you realize. You see, ID had a habit of connecting their games. Since the release of Doom 2 back in 1994, players have speculated that it’s connected to one of ID’s other major franchises: Wolfenstein. “Why would they assume that,” you ask? Probably because the game has secret rooms that perfectly recreate levels from Wolfenstein 3D. Doesn’t get more explicit than that one. Or does it? *Dramatic music* It does, actually. In Doom RPG, released for cellphones way back in 2005, you play as BJ Blazkowicz the 3rd, who, according to the game’s ancient website that’s only accessible via ‘Wayback Machine’, is the protagonist of Dooms 1, 2, & 3. The name Blazkowicz would make him the descendant of William BJ Blazkowicz, the World War II veteran who stars as the hero of the Wolfenstein series. Once again I say, doesn’t get much more explicit than that. And yet, once again I would still be wrong, because the masterminds behind these games have been very eager to confirm a lot of early theories, going on Twitter lately to not only confirm the Blazkowicz connection, but go one step further by looping in yet another of their game series, Commander Keen. And, don’t worry if you’re not super familiar with that name. Keen couldn’t be any further from his Mecha-Nazi slaughtering kin. It’s a classic side-scrolling action game about an eight-year-old boy named ‘Billy Blaze’ who builds himself a spaceship, dons a helmet, takes a cheesy name, goes off to Mars and starts blasting up the place when locals take apart his ship. Confirmed by a Twitter conversation in 2018 between a fan and Doom creators John Romero and Tom Hall, the Doomguy is, canonically, the son of Commander Keen. End quote. So, we already have ourselves a name and a cool lineage for one of gaming’s most famous unnamed protagonists. But before we leave the ID-verse, let’s just go ahead and throw Quake in there too, as Doomguy appears in Quake Champions, specifically citing him carrying around the foot of his dead rabbit, Daisy. A rabbit we see mentioned in episode 4 and the ending of the original Doom. Doomguy is literally the O.G. John Wick, except instead of taking down mafiosos for killing his dog, he’s taking down hell beasts for killing off his rabbit. Awesome! Anyway, all of this helps confirm that Doom 2016, the new reboot of the Doom franchise, actually stars the original Doom Guy, BJ Blazkowicz the 3rd himself. Notice how at the beginning of Doom 2016 you’re in a high-tech lab, but for some reason you yourself are strapped to this random stone slab and chains, and how later in the level you see this replication of a stone sarcophagus. It’s unusual – until you read the other lore descriptions from Quake Champions. *Low pitched voice* That, coupled with the pet rabbit reward poster found in the game, shows that Doomguy has been kicking interdimensional butt for over three decades! Regardless, it’s not that impressive to connect Doom to itself. What is impressive, though, is connecting Doom to our love, our life, the meme lord himself, Shrek. We know that BJ is not only related to someone who fought in a World War, but also, canonically, starts and ends his Doom 1 story here on Earth. And not just some future version of Earth, either. It is Earth in 2019, this year, which is when he’s sent to Mars as punishment for assaulting his superior officer, and all that time spent here on terra firma gives him plenty of opportunity to Kickflip McTwist in Tony Hawk’s Pro Skater 3, where he was a PC-exclusive playable character. The Tony Hawk connection now opens up the possibility of BJ nose-grinding against the likes of Shrek, Star Wars second-stringers of Darth Maul and Jango Fett, and even the character we all were waiting to board with: C.O.D. Soldier. That’s… that’s honestly how he’s known…. C.O.D. Soldier.
(Call Of Duty) Great… generic soldier for a generic franchise. Anyway, while I would love to sit here and ponder all the ways Doomguy would be able to tear the Star Wars bestiary limb from limb, I’m much more interested in how he could single-handedly destroy the combatants in the world’s most popular game. Forget mysterious purple cubes and illegitimate lawsuits from old TV stars, the biggest canon threat to Fortnite Island is our green clad Space Marine. You see, Spider-Man is an unlockable character in Tony Hawk’s Pro Skater 2, and as ‘Into the Spider-verse’ made clear, all Spidey’s exist in one connected multiverse. And we know that Doomguy ain’t afraid to charge headfirst into an interdimensional portal. So now Doomguy can really go on a rampage. Ultimate universe Green Goblin? Meet The BFG. Lizard? The Doom Slayer is gonna tear that arm off again my buddy. So we go from Doom to Tony Hawk to Spider Man and then on to Thanos from ‘Infinity War’ who, early last year, made a detour to Fortnite Island after collecting all his pretty little gem stones, which means that Doomguy can now take the same trip. Forget goofy dinosaur pyjamas, all you need is green body armor. New-school meets old-school brutality. But in all seriousness, can we actually make this happen? Can we just all tweet at Epic Games and Bethesda? It would help promote Doom Eternal anyway, and it would be such a cool old-school style crossover. And like I said, it is still within the canons of all of these universes. But the possibilities opened up by Spider-Man keep going – because it also connects the universe that older viewers may be less familiar with: the Disney ‘Infinity’ universe. Although it sounds like some kind of universe caused by Infinity War, Disney Infinity is actually a series of video games based around Disney and Marvel properties. All aimed at a younger crowd and powered by Disney’s version of amiibo – or probably more accurate to say, Skylanders, since they were the first ones that everyone else was ripping off. ( 🙁 ) Anyway, canonically, all of the events in the Disney ‘Infinity’ games are actually happening to toy versions of our heroes. *said in a deep voice* “These can’t just amount to toys in a box.” Yeah, I know I said that at the beginning of the episode and you’re ready to throw it back in my face in the comments, but guess what? I also script these videos and intentionally wrote that in, explicitly to set up this twist on my own words in this very moment. And that twist is this: the Infinity universe canonically exists in a place called the ‘Toybox’. “Welcome to the center of your experience: the ‘Toybox.’ Anything’s possible here with a spark of imagination.” A toy-based universe where real world locations can be replicated and where weapons of the toys actually function in the way that they should. And what do we see in the Toy Story level in Kingdom Hearts 3? A world named the ‘Toybox’, where real-world locations are replicated and where weapons actually function the way that they should. So much so that even the toys are surprised by it. Woody: “Say we have been taken to some kind of alternate world. That would explain why your laser’s real.” It’s even outright acknowledged that, while this should be the real world, considering that, you know, these are toys that are played with by humans. That the Toy Box in Kingdom Hearts 3 isn’t the real world. Sora: “I’m sorry.”
Toys: “What?” Sora: “I wanted to get you back to the real world.”
Buzz: “It does seem that we’re trapped here…” Rex: “We’ll never get home.” Somehow, the attacking Heartless and merging worlds of Kingdom Hearts kicked – all of the Toy Story characters over into the Disney Infinity Toybox, explaining all the strangeness that we see throughout this entire level. And that means nowhere in all of Kingdom Hearts is safe from Doomguy’s wrath. None of your favorite Disney universes are gonna be spared this time. Davy Jones’s heart box ain’t gonna be lasting too long against frag grenades and a shotgun. Beast isn’t gonna get the chance to fall in love with Belle before the last petal falls because doom guy confused him with a baron of heck. And Cloud will have a powerful new ally in the struggle against Sephiroth, because since Kingdom Hearts is the epic collaboration between Disney and Square Enix, this connection doesn’t just open up the Disney movies, but pretty much every single Final Fantasy game as well. Can you imagine Kefka now visiting Fortnite Island? Or Sora, Donald, and Goofy flying their Gummi Ship to Castle Wolfenstein to teacup-ride Mecha-Hitler to death? I can, and it is glorious. Hehe, I’m legitimately really excited about that. I know I over-exaggerated that for effect, but it would be the embodiment of all the stupid fun that video games have. And the Final Fantasy connection now opens up two other huge chunks in this already massive web. The first comes courtesy of Final Fantasy 15. Now, even though Kingdom Hearts 3 has moments that feel very reminiscent of people and settings from FF 15, there have, to my knowledge, never been any direct physical links between the two universes. That said, there have been plenty of crossovers with Final Fantasy X, including the characters Tidus and Wakka. The main setting of Final Fantasy X is the world of Spira. Now, follow me on this. Over in Final Fantasy XV, we have the city of Insomnia, the crown city, and everywhere in that metropolis there are signs – tons and tons of signs – all making coy references to famous enemies and characters from all the other installments. In fact, Reddit user ‘scissorman’ went out of his way to document as many as he could find. But there was one set that really stood out to me: the multiple references to Spira as a real world location. Real enough to have multiple banks and security businesses named after that. And these also appear in the Final Fantasy 15 movie Kingsglaive. Now, I know this isn’t confirmed 100%, and I know that many Final Fantasy fans hate the idea of the worlds of these games being connected – outside of VII and X which actually do share a canonical link – but it doesn’t seem that far-fetched to me that this link would exist. And if it does – and I hope it does – it opens up the entirety of the Ubisoft Universe that I covered in a previous episode on crossovers. Assassin’s Creed Origins has a Final Fantasy XV quest complete with desert-ready chocobo. And, as I covered in that previous video, the Assassin’s Creed link then brings in Far Cry, Splinter Cell, and Watch_Dogs, which means that hackers now could visit Kingdom Hearts’s Tron world and hop inside the computers that they’re hacking. Ezio could assassin it out with Yuffie, and Organization XIII could finally shut up about ‘darkness in your heart’ and instead focus on an equally useless task: helping the Templars out looking for those damned pieces of Eden. And if that wasn’t enough crossover potential, Final Fantasy characters have also done a fair bit of crossing over with Mario and the gang. For instance, Mario Hoops 3-on-3 and Mario Sports Mix both feature pick-up basketball matches against Moogals and black mages like Vivi. This, in turn, brings in all the Nintendo titles I talked about in my first ever connected universe theory from, like, 7 years ago: Mario and Metroid, Zelda, Kirby, and Captain Rainbow, heck, even Tetris. And if we’re talking Mario sports crossovers, then you know that’s gonna bring over Sonic and his whole gang from all those times Mario and Sonic competed at the Olympics. Again, no Smash Brothers allowed here, but Mario is in so many places it hardly even matters. And with that, we’ve come full circle, crossing over not only with a massive number of games, but crossing back over to my first ever crossover theories in the first place. It’s a crossover of crossover episodes! Which again, just goes to show the seemingly endless limits that all these franchises can go. Link and Samus could hop into the Battle Bus and compete in the Battle Royale, Knuckles could knock heads with Noctis. Kirby could dine with Ratatouille. Kamek could cast magic alongside Donald and compete for who’s more annoying. Heck, Mecha-Hitler could get repairs from Robotnik! When you stop and think about it, it seems like the only franchise left that isn’t included is, uhh, well, FNAF. And ain’t that a shame, ( aww ) ’cause I would love to see Doomguy make one final crossover just to finally give Purple Guy what’s coming to him. BUT HEY, that’s just a theory. A GAME THEORY! Thanks for watching! Make an epic crossover of your own by joining the Theorist community. Smash that subscribe button, and heck, if you didn’t see our previous two connected universe theories, left is the Ubisoft Universe and right is the OG one that started it all, ‘all video game universes are connected.’ Whoo boy, cringy MatPat was super cringe back then. Ohhh, crossover of the MatPat’s! The MatPat-iverse! (imagine that.) Subtitles crossed over by:
Electric Logan & gang

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  1. There is another wolfenstien game and the twins go to find their father blazkowicz.The twins are both female and showing one or both of them will find love and create billy blaze

  2. The Regalia (the car from final fantasy) is in Forza Horizon 3 and 4 so the Forza Franchise is also in this sheared universe, and in those games, another car available is the Warhoge from Halo and there’s also a Halo misión in Forza Horizon 4. So Master Chief can go out there and give a hand to the Doom guy

  3. I think doom and fallout are connected
    In doom 2016 the beginning of the game in the door of the first battle has a vault-tec logo

  4. Also since theres a spider-man in the archie sonic comics called stealth the hedgehog that means also the archie sonic comics, street fighter,And mega man!

  5. Man u think only u want a cross over I already had a plan to make a game about that just…… don't what game engine to use any suggestions u guys

  6. We can actually bring FNAF and Connect it to Star Fox. there's literally a section in FNAF world referencing it as a WHOLE! Fredbear even says "Do a barrel roll" At some point!

  7. I make games, and I can confirm that my title, Glock Boy takes place in the same universe as DooM, But my title, Noteification takes place in a completely different universe

  8. Also because of the doom connection this would include fallout 4 and Skyrim, meaning the entire elder scrolls and fallout series. Chocobo and moogles appear in yo kai watch 3, so because of the mobile game puni puni this ties in EVERYTHING. Inazuma Eleven, the Layton series, The Seven Deadly sins, DragonQuest, and more. The tony hawk pro skater this also includes Bart Simpson I think

  9. Mat pat technically fnaf and doom are connected because dood is in hell and custom might takes place in hell

  10. Oops you Just Cause because of the final fantasy sword in a mountain in fictional Montana. I would like seeing Rico (the main character) drop onto the fortnite island with doom guy!

  11. throw in bendy, fnaf, undertale, Zelda, Minecraft, SPIDERMAN PS4, MY SPAGETT MEME, LIFE IS STRANGE, POKEMON, ROBLOX, FNAC, JOLLY 1,2, AND 3 (both chapters), AND YOU GOT YOURSELF A REAL CROSOVER THEORY, A GAME THEORY! oh and don't forget terraria by the way, and granny, and baldi's basics, and-
    omg so many games

  12. so… with the other fortnite theory (the it merging with our world one) are you saying that multiverse theory is true?

  13. Matpat, you've done all the big gaming franchises I'll admit. There is just one though, the biggest and bestselling game of all time…


  14. Kingdom Hearts? THAT ties in into the Nerdist's Epic Cartoon Crossover Universe! Check it out and make a video about it!:

  15. Mario has a mash up pack which means we connect Minecraft to the mix and it has a bunch of other media and stuff plus we can get to Skylanders cuz donkey Kong and bowser is in there so that’s my continuation

  16. The doom slayer and doom guy are completely different people because the slayer is from argent da ner and was the leader of the night sentinels and made a deal with hell to bring back his dead son by betraying the sentinals and his home. Then hell brings his son back as the icon of sin then he gos on a muderus rampage in hell

  17. The quake connection is in the 3rd game a Sargent in some army is inducted into a interglacial arena for the greatest champions to compete in and who is on the roster none other than doomguy also this is believed to be the battle ground of quake champions as well

  18. Guys MatPat is right. All these games are made by real humans which live on Earth so every game is connected.

  19. Doom guy could also go into the xenoblade chronicles universe bcus of the xenoblade chronicles 2 crossover with Zelda botw

  20. Mega man is in smash bros
    Mega man is in Marvel Vs. Capcom
    Thanos is in Marvel Vs. Capcom
    Thanos is in fortnite
    Therefore, thanos could be in smash bros.

  21. Forget about Infinity War being the best crossover, it's GAME THEORY that wins the competition by making that doom guy destroy Fortnite and all of those innocent games, and heck, even movies!

    What a shame FNaF couldn't get included in the timeline so that Purple Guy gets what he deserves.

  22. Matpat you forgot about a very important detail. In one of the first Wolfenstein games you can fight a demon in a secret room. After removing its arm and leg it retreats back to hell and says something along the lines of I'll be back to end your bloodline or something. And he tried to do exactly that with a new arm and leg and now calls himself the Cyberdemon. Looks like Doomguy finished the fight his grandfather started.

  23. When I saw connecting kingdom hearts and doom I should have unsubbed dislike and head out…

    But I made the mistake of staying

  24. Guys, even though theres a lot of holes in this theory, let's just let matpat have this. It probably took a long time for him to finish it.

  25. Ok some universe's matpat missed animal crossing and splatoon from Mariokart 8, the skylander games because super chargers with bowser and D.K

  26. The Inclusion of Sonic now opens up the connection to OK KO, Who also crossed over with Steven Universe, Teen Titans Go and Ben 10. Ben 10 crossed over with Generator Rex and the secret Saturdays, Steven Universe crossed over with Uncle Grandpa, who originated from the old CN show, Secret Mountain Fort Awesome, And Teen Titans Go crossed over with The PowerPuff Girls, who regularly cross over with Dexter's Laboratory. Uncle Grandpa in particular also made a cameo appearance in Amazing world of Gumball in the episode "The Boredroom" alongside Mordicai, Rigby and Highfive Ghost from Regular Show, and Clarence and Mary from Clarence. A Dexter Balloon appears in Codename Kids Nextdoor, in the episode U.N.C.O.O.L.

    In "Dad is Disturbed" From Dexter's Laboratory, Barney and Betty Rubble from the flinstones appear, and they've crossed over with the Jetsons and also with WWE, who also crossed over with Scooby Doo. Yogi Bear also makes a cameo in The Flinstones, Dexter, as well as the Eds make an appearance in Forster's Home for Imaginary friends, Which was part of the Cartoon Network event which included it, Ed Edd N' Eddy, Puffy AmiYumi, Camp Lazlo, And Grim adventures of Billy and Mandy.

    Getting back to Scooby Doo, it, like Mario, crossed over with a lot of things, but the big one, is that there was an entire show where Scooby Doo and the gang went on adventures with Batman, and they also team up with Wonder Woman, Superman, Deadman, The normal Teen TItans Aquaman, The Flash, and, get this, EVEN GOD DAMN GODZILLA!!! Godzilla is really important because he didn't cross over with the DC universe (though he was intended to), but he was in the earth 616 Marvel Universe, meaning the links with Spiderman can just keep coming!

    Godzilla also appears in city shrouded in shadow, which also features Eva-01, Gamera and Ultraman! Godzilla also appears in Zone Fighter.

    Evangelion also crossed over with Transformers, who crossed over with Spiderman, who crossed over with Superman, who crossed over with The Men in Black and Pokemon, tieing it all back to videogames.

    Also, Spiderman showed up in the Simpsons Futurama crossover crisis, which also includes Donkey Kong, Space Invaders and, most importantly here, Mickey Mouse. And it just keeps getting crazier and crazier until we find that every work of fiction is connected in some way, shape or form. Infact, sense crossover Wiki includes the Nostalgia Critic and AVGN on it, we may aswell include Youtube itself, meaning that now we have become a part of this crossover.

    We've gone too deep.

  27. If only minecraft could do crossover😭 why do you not have Mario minecraft! Why! Wait… lucky block mod…

  28. To editor from the past.
    The future is horrible bad not Like you, we have to pay for oxygen and the earth was full with carbon dioxide and radiation form the space. so plz stop producing co2
    For the sake of you grandson/granddaughter.
    form 2167 genkaku

  29. “cracks knuckles”

    Five Nights at Freddy’s characters appeared in an indie game dubbed Creepy Castle which also stars characters from Super Meat Boy. Super Meat Boy features Steve from Minecraft which features costumes of Mario characters, as well as a Mario World.

    Mario better watch out for Freddy.

  30. So there should basically be a mod to play the doom guy for every game. Nice, can someone make that please? No? Ok, I'll do it myself

  31. Purple guy is in HE double hockey sticks AND doom guy has been fighting in HE double chica legs….

    Coincidence I think not!

  32. KH chain of memories features cloud on multiple occasions, but I’m not sure how CoM fits into the overall universe…

  33. You forgot to mention that, with Noctis being in Tekken 7, that means the universes are now also connected to Tekken (and Soul Edge/Calibur through Yoshimitsu), The Walking Dead (Negan), Street Fighter/Final Fight (Akuma), and Fatal Fury/King Of Fighters/SNK full fighting universe (Geese).

  34. I'm not a believer in the Doomslayer being classic Doomguy theory. BUT! if that theory means Doomguy can travel to Disney and the other places then I'm down with it


  35. Remember that time when the Doomguy went on a murder spree in Bolivia against a Mexican drug cartel? No?

    Well, it could've happened . . .

  36. Skylanders Imaginators and Superchargers actually confirm the theory of all games are being connected. They are each their own universe that every few years a rift opens, connecting them.

  37. The smash and PS battle royale games are just toys in a box? That's EXACTLY what Disney infinity is! But you count Disney infinity, so why not the smash and PS battle totaled games.

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