History EnemyMine / Videogames

** On the Crimson Flower route of ''VideoGame/FireEmblemThreeHouses'', the Adrestian Empire considers "Those Who Slither in the Dark" a very dangerous enemy, but reluctantly ask for their aid in fighting the combined forces of the Church of Seiros and the Kingdom of Faehrgus. Byleth, Edelgard, and Hubert are disgusted by the very idea[[note]]Byleth wants revenge against the cult for killing their father, Jeralt. Edelgard hates them because of the horrifying experiments they conducted on her and her family in the name of [[EvilutionaryBiologist gathering test subjects capable of bearing multiple Crests]], and for instigating a soft coup that [[PuppetKing stripped the previous emperor of his power]] (which also implicated the fathers of most of her friends in the Black Eagles house, including Hubert). Not only that, but their leader, Lord Volkhard von Arundel (a.k.a. [[spoiler:Thales]]), is Edelgard's EvilUncle, adding an extra layer of ItsPersonal for her.[[/note]], and the two sides continue to plot against one another even as the Empire gains the upper hand in the war. Once the war against the Church ends, "Those Who Slither in the Dark" quickly find themselves on the receiving end of the Empire's wrath as the last enemies to eliminate before true peace in Fódlan can be achieved.

* ''VideoGame/SuperRobotWarsDestiny'' is an interesting example. While the game includes antagonists from ''[[Anime/MobileSuitGundamZZ Gundam ZZ]]'', ''[[Anime/MobileSuitGundamCharsCounterattack Char's Counterattack]]'', and ''[[Anime/MobileSuitGundamWing Gundam Wing]]'', the situation at hand causes them to have the competence to ally with you all at the start since things are bad enough. Due to the [[Anime/MobileSuitVictoryGundam Zanscare Empire]] attacking Earth, along with the [[Manga/GetterRobo Invaders]], and the [[Anime/{{Macross7}} Protodevlin]], and the united alien forces of the villains from ''[[Anime/FutureRobotDaltanious Daltanius]]'', ''Anime/{{Godmars}}'', and ''[[Anime/UFORoboGrendizer Grendizer]]'', your heroes quickly realize the only organizations out there that still have the sheer manpower to defend humanity are the Principality of Zeon and the Order of the Zodiac. [[Anime/TheBigO Roger Smith]] takes care of the negotiations. This results in the first ''heroic'' roles for longstanding villains like [[LadyOfWar Haman Karn]] and Treize Kushinada.
** ''VideoGame/SuperRobotWars'' likes to play with this in smaller ways as well. For instance, ''VideoGame/SuperRobotWarsW'' has a stage where [[Anime/TekkamanBlade Tekkaman Evil]] is forced to (briefly) work with the heroes because of the takeover of Tokyo by the [[Anime/GaoGaiGar Zonder]]. On the Selena route of ''VideoGame/SuperRobotWarsAlpha 3'', not only does Selena herself spend some time assisting the [[Anime/MobileSuitGundamSEED Cruscet team]], Andrew Waltfeld and his adjutant Martin Dacosta assist the Alpha Numbers in holding off an attack by the [[Anime/{{Macross7}} Barota]] in a later stage.
*** One OG example is when Sanger and Elzam storm the Tesla Liecht Institute to retrieve the Dynamic General Guardians being kept there from the Inspectors. When Sanger's Grungust Type-3 gets damaged, the Inspector Vigagi is about to land a fatal blow when Wodan Ymir appears and intervenes, claiming that he is the [[TheOnlyOneAllowedToDefeatYou only one allowed to kill Sanger]]. Wodan buys enough time for Sanger to activate the Dygenguard, and goes so far as to be the one who helps Sanger retrieve his Type-3 Zankantou (a job that was given to Elzam in Alpha 2) to continue fighting when Dygenguard's original weapons malfunction.
*** In the final episode of ''The Inspector'' anime, [[TheHero Kyosuke]] and [[TheRival Axel]] end up working together to take down the BigBad.
*** ''VideoGame/SuperRobotWarsEX'' is an interesting case because some of the characters you can recruit ARE enemies in their respective series that are cooperating because they are stuck in La Gias with no way back. Shu's route is unique because the only ''heroes'' you actually can recruit (on that route) are the [=GoShogun=] team and [[Anime/MobileSuitZetaGundam Quattro]]. The rest are all villains like [[Anime/AuraBattlerDunbine Todd Guiness]] and [[Anime/MobileSuitZetaGundam Jerid Messa]].

** During the 1st Era war against the [[KnightTemplar Alessian]] [[TheOrder Order]], the Colovian King Rislav formed an alliance between himself, the Direnni Hegemony (an [[MageSpecies Altmeri (High Elven)]] nation which ruled about 1/3 of Tamriel's landmass out of High Rock, and the [[HornyVikings Nordic Empire]] led by [[TheHighKing High King]] Hoag Merkiller (a nickname) of Skyrim. So hated was the Alessian Order that a bastion of Merrish might bordering Skyrim willingly allied with a king so famous for killing Mer that it became ''part of his name''.

* In the fourth ''VideoGame/{{Skylanders}}'' game, ''Trap Team'', Kaos breaks the Doom Raiders, a group of the most notorious villains seen in Skylands, out of Cloudcracker Prison to have them assist him. The Doom Raiders, reminder, [[DidntThinkThisThrough some of the most]] [[EvilIsNotAToy dangerous villains ever seen in Skylands]], follow their own plans and instead has Kaos serve them. Kaos trying to upstage their leader, the Golden Queen, is what results in them dumping him. So Kaos does the "unthinkable" and teams up with his arch-nemeses the Skylanders to defeat the Doom Raiders. [[TeethClenchedTeamwork And Kaos is obviously hating every second of it]].