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[[quoteright:300:[[Film/TheFifthElement https://static.tvtropes.org/pmwiki/pub/images/swiss_army_gun.jpg]]]]
[[caption-width-right:300:Order yours ''now!'']]

Simply put, it's a gun that can do a whole bunch of stuff depending on the situation. Like a Swiss Army knife, with just a flip of the wrist it can be a rocket launcher, shotgun, machine gun, grenade launcher, or [[NinjaPirateZombieRobot chainsaw rocket catapult]]. This gun seems to be whatever you need, when you need it, just as long as it's some kind of projectile weapon. Don't even begin to mention the obvious [[AwesomeButImpractical design flaws]], because this weapon is powered by RuleOfCool, with a little bit of HyperspaceArsenal thrown in.

Subtrope of SwissArmyWeapon. Often also a {{BFG}} (hey, those extra guns are gonna take up space). Compare to DoAnythingRobot, for its even less realistic equivalent. The key difference between this trope and the DoAnythingRobot is that the Swiss Army Gun generally has some kind of limit or some set number of forms. GunAccessories are a common method of creating such a weapon.

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!!Examples:

[[foldercontrol]]

[[folder:Anime & Manga]]
* Daisuke's gun from ''Anime/HeatGuyJ'' may count. The gun itself only has one particularly notable feature, a retractable hook at the bottom of the grip used for close combat. However, it can use a variety of ammo, including standard bullets, [[spoiler:presumably]] a silver bullet, explosive Red Tab bullets, and electric Blue Tab bullets that stun those they hit.
* Sirica of ''Anime/KirbyRightBackAtYa'' wields a machine gun/sword/flamethrower, seemingly stolen from Nightmare Enterprises as it has its logo.
* The Buster Gundam from ''Anime/MobileSuitGundamSeed'' is of a particularly interesting note because it features this except with two guns. Individually, both guns have a separate function. The gun on the right is a railgun while the gun on the left is a [[EnergyWeapons beam rifle]]. The two guns can be docked with one another by plugging the barrel of one into the butt end of the other, which will power up the gun in front. The railgun's powered up form is an anti-armor shotgun, while the beam rifle's is a high-energy, long-range beam sniper rifle.
** A later model, the Verde Buster, mounts the cannons on the shoulders so that they can both be used. However, the docking arms used to mount those guns are given shotguns which have sword blades that unfold out of them.
[[/folder]]

[[folder:Comic Books]]
* In ''ComicBook/JonSableFreelance'', Jon carried a large bore, multipurpose stainless steel revolver, that had a resemblance to an antique pepperbox revolver. The weapon could fire underwater, fire rifle shot, arrow/bolt type projectiles and a multitude of other loads, such as tear gas, explosive, and tranquilizer. This was a RealLife weapon designed for Navy [=SEALs=] that never went beyond prototype.
* ''ComicBook/JudgeDredd'''s Lawgiver, which has specific rounds for basically any given situation.
* ''ComicBook/{{Nightwing}}'' villain Torque was given a assault rifle supplied by Intergang that had various voice-activated functions. It could do laser blasts, explosive blasts, an optics flare for blinding people and a kinetic pulse-type feature that could push something away. When Torque goes overboard and the gun starts overheating, it gets another function: as a bomb.
* In a short story of ''ComicBook/ThePunisher'', Frank interrupted a weapons deal about a special handgun called "The Preacher". Its barrel was designed to fire any type of ammunition, and the butt could auto adjust to accept magazines of any size. Frank pockets the gun after killing off everyone else.
* ''ComicBook/Venom2011'': As Agent Venom, Flash Thompson was given the Multi-Gun, a modular firearm whose default appearance was an assault rifle but which could shift between various alternate modes.
[[/folder]]

[[folder:Fan Works]]
* In the ''Franchise/MassEffect[=/=]VideoGame/CommandAndConquerTiberianSeries'' crossover ''Fanfic/{{Renegade}}'', the Global Defense Initiative has developed "Shapeshifter" weapons using mass effect technology, which consist of infantry rifles that feature various heavy weapon add-ons. This is following GDI's [[MoreDakka standard]] [[{{BFG}} design]] [[BiggerIsBetter logic]] when applied to the lighter, collapsible weapons that can be created using mass effect technology; after all, if they can make their guns ''smaller'' and fold out into full-sized weapons, then they can fit multiple weapons into the same space and weight that a conventional gunpowder weapon possesses.
[[/folder]]

[[folder:Film -- Live Action]]
* In ''Film/BeverlyHillsCopIII'', Serge's "Survival Boutique" sells [[AdvancedTech2000 the Annihilator 2000]], a combination minigun, microwave oven, rocket launcher, portable TV, flamethrower, beverage cooler...
* In ''Film/{{Blastfighter}}'', Pete gives Tiger an untraceable high-tech shotgun. It has an interchangeable rifle barrel, can fire rifle grenades (including tear gas), and comes with a variety of ammo, including, high explosive, incendiary, and amour-piercing. Needless to say, all of its functions get a workout during Tiger's RoaringRampageOfRevenge.
* 2012's ''Film/{{Dredd}}'' features the Lawgiver, with its trademark [[CallingYourAttacks voice-selectable ammunition]]. Known bullet types are: standard-which can be customized for [[MoreDakka rapid fire]] or [[HollywoodSilencer silenced]], stun rounds, [[KillItWithFire Hot Shot]], Incendiary (a long distance white phosphorous like scatter shot), Armor Piercing, and [[StuffBlowingUp High Ex]].
* Zorg on ''Film/TheFifthElement'' has developed one, and gives a very helpful [[Film/JamesBond Q Speech]] on its features, in this quote:
--> ''[[GunPorn Voila, the ZF-1]]. It's light; handle's adjustable for easy carrying, [[RightHandedLeftHandedGuns good for righties and lefties]]; [[IKEAWeaponry breaks down into four parts]], undetectable by X-ray, ideal for quick discreet interventions. A word on firepower. Titanium recharger, [[BottomlessMagazines 3000-round clip]] with bursts of 3 to [[MoreDakka 300]], and with the Replay button (another Zorg invention) it's even easier. One shot... ''(shoots training dummy)'' ...and Replay [[RoboTeching sends every following shot to the same location]]. ''(demonstrates by spraying bullets at the Mangalore warriors; the bullets arc back to the training dummy)'' And to finish the job, all the Zorg oldies but goldies. [[StuffBlowingUp Rocket launcher]]... [[AutomaticCrossbows arrow launcher]] [[TrickArrow (with exploding or poisonous gas heads)]], very practical... our famous [[NetGun net launcher]]... [[FireBreathingWeapon the always-efficient flamethrower]], my favorite... and for the grand finale, the all-new '[[FreezeRay Ice-cube System]]'''. [[labelnote:*]]The [[SchmuckBait unmentioned]] last feature? [[SelfDestructMechanism self-destruct]].[[/labelnote]]
* ''Film/Hero1997'', a HeroicBloodshed movie set in the 1940s, have the mentor character using a bunch of single-shot Winchester rifles bundled together to fire multiple shots at mooks, all at the same time. And later on using a row of rifles tied to a plank to gun down a row of mooks.
* ''Film/InvitationToHell'' has the main character helping to develop a suit meant for an expedition to Venus, which comes with a retractable gun in [[NothingUpMySleeve its sleeve]] that [[EnergyWeapon shoots laser beams]] and can also act as a [[FireBreathingWeapon flamethrower]].
* ''Film/JudgeDredd'': Dredd's Lawgiver:
-->'''Judge Dredd''': Lawgiver 2, 25 round sidearm with mission variable, voice programed ammunition,... Signal Flare!
-->'''Gun''': Flare. vrrrrr
-->'''Judge Dredd''': ''(shoots a blinding flare at the target wall)'' Yours if you graduate.
* ''Franchise/StarWars'' has several of these with their blasters.
** In ''Film/Solo'' Tobias Beckett converted his blaster rifle into a blaster pistol before giving it to Han Solo. This pistol is revealed to be Han Solo's signature DL-44 heavy blaster pistol.
** ''Film/RogueOne'', Jyn Erso "founded" an A-180 blaster pistol and Cassian Andor has a A280-CFE convertible heavy blaster pistol which both can turn from a pistol to a rifle. The Rogue One troopers used A-300 blaster rifle is a unique one that transforms from a blaster carbine to a rifle.


[[/folder]]

[[folder:Literature]]
* ''Literature/TheAlloyOfLaw'' features Vindication, designed to fire specialised rounds that are optimised against various types of magic-user.
* Jeffrey Thomas's novel ''Blue War'', from the ''Punktown'' stories, had the Assault Engine, which were similar to the guns in ''Literature/OldMansWar''. Assault Engines are a combination shotgun, carbine, grenade launcher and energy beam projector to deal with any threat in the jungles of an other dimensional Vietnam-expy.
* In 1980s post-apocalypse men's adventure series ''C.A.D.S'', the titular [[PowerArmour C.A.D.S armour]] has 9mm machine guns, e-ball launchers and liquid plastic flamethrowers. The 2nd generation C.A.D.S armour changes the 9mm machine guns to cannons that can vary their calibres to shoot anything from small pistol rounds to mortar shells.
* The Memory Sword in ''Literature/TheDarkSideOfTheSun'' by Creator/TerryPratchett can become a wide variety of weapons, from swords to molecular strippers to projectile guns that make ice bullets by freezing atmospheric moisture.
* David Gunn's ''Death's Head'' series has protagonist Sven Tveskog's SIG-37, a HandCannon with a true A.I. that can select various ammo types for Sven, aid in targetting enemies and fire a built-in PlasmaCannon for harder targets. The SIG will also offer conversation, tactical advice and whatnot. It also freaked out when it was given a poor paint job.
* ''Literature/AHerosWar'': Minmay's mark 2 magical guns have modes for fire-bolts, force-bolts, shield-penetrating bolts, bullets with magically increased momentum, grenade launching, and a [[BayonetYa bayonet]]. They can also spray pellets like a SawnOffShotgun, but that's ultimately deemed to be unnecessary complexity and removed in later models.
* Colonel Fedmahn Kassad's FORCE-issue rifle in the ''Literature/HyperionCantos'' includes flechette grenades, laser beams, and several other weapons in one package.
-->It was designed to do everything but cook the troops' food, and with its energy weapon component on its lowest setting, it could probably do that too.
* In ''Literature/LogansRun'', the Sandman guns had six [[TrickBullet attack methods]]: homer (a heat-seeking projectile), tangler (sticky net), [[KillItWithFire nitro]], vapor ([[AgonyBeam ignites every pain nerve in the body]]), ripper, and needler. In the movie there were no such settings shown.
** In the TV series, however, Logan mentions the guns have the settings stun, blast, and kill. While the TV and movie guns can run out of charge, they are not limited to the six shots.
** Also in the book, the gun was a [[RevolversAreJustBetter revolver]] that came loaded with exactly one bullet of each of these types, and Logan ([[ExactlyWhatItSaysOnTheTin being on the run]]) had no access to spares, averting BottomlessMagazines and making each shot both a ChekhovsGun and TooAwesomeToUse.
* The guns used by Jack Frontino, from Creator/JohnCWright's stories "Murder in Metachronopolis" and "The Plural of Helen of Troy". They include the "Unlimited Class Paradox Proctor Special" in the former story, and the "Police Special" in the latter. Although the Special seems to be the size of a normal pistol, it's just the the part that exists in our three dimensions--the actual components of the weapon occupy a small warehouse and are stored in higher dimensions. The Special has a wide array of functions, able to shoot a variety of things from laser rays to [[FireBreathingWeapon burning gasoline]], and providing support abilities--such as force-fields to protect the shooter, or automatic aim.
* The rifle used by CDF troops in Creator/JohnScalzi's ''Literature/OldMansWar''. It can shoot bullets, grenades, flames, microwaves, rockets... Even better, one can customize to fire, say, a blast of flame followed by a grenade. The "ammunition" is a block of nano-machines which assemble into the correct type of ammunition upon firing.
* In ''[[Literature/TheQuantumThief The Fractal Prince]]'', the warrior Mieli joins a mercenary army in protecting a steam train from "Wild Code", when the odds start getting bad - she reluctantly brings out her multi-purpose cannon. Against a storm of incoming Wild Code, she vaporizes that whole area with a Quark-Gluon plasma charge and when a ursinoid mercenary gets corrupted and attacks her, Mieli puts a large hole in her with the cannon's X-Ray laser.
* ''Literature/TheRisenEmpire'' had its military armed with variaguns. These guns could use a variety of ammo for its ballistic hardware and also had a built-in RayGun that could stun or kill depending on setting.
* In "Literature/TheSoftWeapon", a 1967 story by Creator/LarryNiven, the titular weapon includes a wide variety of functions. It is also a MorphWeapon.
* The dial-a-gun or "dallygun" from Creator/GordonRDickson's 1970 SF war novel ''Literature/TacticsOfMistake''. It wasn't very practical for the harsh combat environment, as dirt could jam it and it required that lots of different ammunition and spare parts be available, but the protagonist used it once to great effect.
* [[Creator/IainBanks Iain M. Banks]]'s ''Literature/UseOfWeapons'': during his search for an [[{{BFG}} FYT]] gun, Zakalwe stops suddenly and takes something from a shelf.
-->"What a beauty!" He gripped the stunningly complicated weapon and twirled it. "What ''is'' this?" he breathed.\\
"Micro Armaments Systems, Rifle," the drone narrated. "It's ... oh, look, Zakalwe; it has ten separate weapons systems, not including the semi-sentient guard facility, the reactive shield components, the IFF-set quick-reaction swing-packs or the AG unit, and before you ask, the controls are all on the wrong side because that's the left-hand bias version, and the balance - like the weight and the independently variable inertia - are all fully adjustable. It also takes about half a year's training just to learn how to use it ''safely'', let alone competently, so you can't have one."\\
"I don't ''want'' one," he said, stroking the weapon. "But what a ''device''!"
[[/folder]]

[[folder:Live-Action TV]]
* ''Series/{{Battlestar Galactica|2003}}''. Pilots are equipped with standard sidearm with a large-calibre underbarrel attachment for explosive rounds that can make Centurions' [[YourHeadAsplode heads explode]]. Presumably it also fires specialist loads like signal flares for downed pilots.
** This may be based off vierlings like the [[http://en.wikipedia.org/wiki/TP-82 Space Gun]], a combination sawed-off rifle/double-barreled shotgun designed as a compact foraging tool, since different game animals are easier to hunt with shot or bullets.
* ''Series/BlakesSeven'' featured some of these for the last season when they started going more overtly CyberPunk. Quite how one makes a relatively small handgun fire [[SlowLaser Slow Lasers]], [[TheParalyzer unspecified less-lethals]], [[KineticWeaponsAreJustBetter "old-fashioned percussion bullets"]] and [[InformedAbility a bunch of other stuff they never get around to using]] ''just by swapping magazines'' was glossed over.
* ''Series/JuukouBFighter'' (and it's American adaptation, ''[[Series/{{Beetleborgs}} Big Bad Beetleborgs]]'') had the Input Magnum (in ''Beetleborgs'', the Sonic Laser), a laser gun that, depending on the 3-digit code inputted on the bright blue keypad on one side, would fire different beams or effects. The sequel, ''Series/BFighterKabuto'' (or ''Beetleborgs Metallix'') had the Input Card Gun (Data Laser in the US), where different Input Cards would be slid into the back for different effects.
* ''Series/LevelUp'': Wyatt's Blast-A-Ton is gigantic Swiss army gun with lots of ammo and many types of ammo.
* ''Series/SaturdayNightLive'' had a fake commercial for a Swiss Army Gun, complete with giant ivory toothpick and corkscrew.
* Even at the most limited definition (things that could be the same basic effect to different degrees counts as one mode, and modes that ''could'' be used as weapons but aren't are discounted), ''Franchise/StarTrek'''s phasers have at least two attack modes: shoot at things to make them stunned/killed/disintegrated[[note]]disintegration is ''probably'' a separate function, but the stun/kill settings are implied more than once to be a matter of the strength of the attack more than any fundamental difference in what it does -- high stuns can kill, and low kills can sometimes be survived even by mundane [[PunyEarthlings humans]][[/note]], and blow up.
** [[AllThereInTheManual Supplemental materials]] went into a bit more detail. The basic Type 2 hand phaser has sixteen power settings: Level 1 is basically a wireless taser, Level 3 will knock an adult human unconscious for about an hour, Level 7 is almost universally lethal and Level 8 is a DisintegratorRay. The settings beyond that tend not to get used much, but Level 16 would probably put the frontal armour of a 21st century main battle tank to some trouble. They also have a seldom-used SpreadShot mode.
* In the ''Series/{{Supernatural}}'' episode [[Recap/SupernaturalS02E22AllHellBreaksLoosePartTwo "All Hells Breaks Loose, Part Two" (S02, E22)]], the Colt, a gun which can kill most supernatural creatures, is also used as a key to unlock a crypt which is sealing a Hell Gate.
[[/folder]]

[[folder:Tabletop Games]]
* If you like the idea of using [[Film/TheFifthElement Zorg brand weapon clusters]] in your OGL science fiction games, there is a blatant copy in the OGL supplement ''1001 Science Fiction Weapons''. You will need to be proficient in both energy and slugthrower weapons to use the General Weapon System Mark 183, which contains a shotgun, particle beam, laser, micromissiles, and grenade launcher in one single handy pod. The more advanced Mark 490 contains an X-ray laser, stun ray, plasma gun, armour-piercing force bolt, and an antimatter gun.
* ''Tabletopgame/BattleTech'''s Mauser 960 Assault System, the standard issue rifle of the Star League, was a laser rifle with an integrated grenade launcher, a [[VibroWeapon vibro]] [[BayonetYa bayonet]], and an enormous survival kit (flares, emergency nutrient pills, a radio, a spade, and a medical kit) built into the stock. Few exist in the modern age, most of which are in horrible shape save for a sizable stockpile of pristine ones in [[ChurchMilitant ComStar's]] vaults. Like the real life OICW, it was an enormously heavy design that rapidly fatigued its users; and the Clan retrofit is even heavier.
* In ''TabletopGame/{{Paranoia}}'', cone rifles and some other guns take multiple types of ammo (armor-piercing, hallucinogenic gas, etc.) with the same size shells, which are [[SarcasmMode never ever mislabeled]].
** And some of those mislabeled cone shells ''definitely'' wouldn't have a chance of being [[NukeEm tactical nuclear devices]].
* You have to be superhumanly strong to use most of them, but ''Naruni: Wave 2'' for ''TabletopGame/{{Rifts}}'' contains a series of mercenary multi-rifles, which tend to combine three weapons in one, such as the Silverfire, which contains a gun which fires silver projectiles, a flamethrower, and a laser; and others that combine plasma cartridge, laser, plasma beam, grenade, micromissiles etc. together, usually in combinations of three. Some can even have a vibro-bayonet mounted, for extra cost.
** The Daisho-10 made by the Oni in the [[SpaceOpera Three Galaxies]] setting is a nonomachine-based weapon that transforms between a Sub-machine gun and a Vibro-sword. The company that produces it also has a version reserved for its own use that has a fully-functional third form of a camera or hand-held computer.
* ''TabletopGame/{{Warhammer 40000}}'':
** You think the standard SpaceMarine is scary with his automatic-explosive-armor-piercing-round firing "Bolter", don't you? Say hello then to the Sternguard Veteran, who, prior to the game's eighth edition, carried guns that could switch between '''multiple''' specialized bolter ammunition types depending on the situation, be they incendiary-fireball-explosive, scalding-gas-explosive, supersonic-velocity, extra-armor-piercing or scariest of all, ''poisonous-acid-filled'' bolts.
** And then the TabletopGame/{{Deathwatch}} go one better, bringing bolts that disrupt the power of psionic entities (like Chaos Sorcerors) and bolts that ''create miniature [[HyperspaceIsAScaryPlace gateways to hell]]'' to the table... amongst many others.
** The tabletop game has rules for combi-weapons, basically a weapon with a different weapon attached and can be used once per game. When they debuted in the ''Slaves of Darkness'' supplement for Khorne and Slaanesh, a combi-weapon with two different guns was the bare minimum (a character could have a combi-weapon with many more guns than just two) and combi-weapons could be used as many times as you wish. The game's eighth edition restored their ability to fire multiple times, but added an accuracy penalty if both parts of the weapon are used at once.
** Any and all Ork shootas can be used as melee weapons, some by having choppy bits, others by virtue of being over fifty pounds of pig-iron held together with spit and WAAAAGGGGHHHHH!.
** Chaos Obliterators are former Mechanicus troops and priests who have been infected with a virus that literally turns their flesh into steel, and can create any weapon they want from their bodies.
[[/folder]]

[[folder:Toys]]
* The Johnny Seven O.M.A. (One Man Army) gun from the 1960s. Grenade Launcher, Anti-tank rocket, and more.
* The Multi-Pistol 09 had multiple grenades and rockets, fired a couple of different types of plastic bullets, and even had a small derringer concealed in the grip.
* Toys/NerfBrand guns began adopting a play pattern incorporating GunAccessories around 2005--what had previously been simple foam firing toys gave way to an iconic series of pseudo-militaristic dart shooters. The Modulus series of 2015 went the furthest with this idea, resulting in toys lke the Tri-Strike, which fires standard darts from a magazine, a four-set of darts from a shotgun-like direct pump, and a single-shot mega dart launcher. Other toys such as the Demolisher include a standard dart shooter but also a mini-missile launcher. It also has slot space for a scope, barrel flashlight, laser pointer, foregrip (with derringer!) and ballstic shield, meaning that someone with time and effort could have a ''lot'' of extra darts to fire on short notice.
* The Remco System 7 toy gun from the 1980s. Spinny-disk shooter, periscope, decoder, parachute launcher, ring key lock, secret compartment, and a lot of pure awesome.
[[/folder]]

[[folder:Video Games]]
* Activision had the game ''VideoGame/{{Apocalypse}}'' starring Bruce Willis. Willis was scientist Trey Kincaid, a master with nanotechnology who used his technologies to develop a weapon that was a humble machine gun, but with the proper ammunition could become a laser, particle beam or various explosive weapons.
* In ''Videogame/BattleZone1998'', the astronaut's automatic plasma rifle can be shouldered to use an integrated [[SnipingTheCockpit cockpit-penetrating sniper rifle]]. In the sequel, the Pulse Rifle used by ISDF has the same functionality, with the addition of a telescoping barrel and a more ergonomic digital scope that pops up from the rear of the receiver. The sequel also has a 'Bazooka' alternate weapon, which can fire (relatively) rapid-fired rockets, or a massive high explosive blast.
* Throughout the ''VideoGame/BlazBlue'' series, Noel Vermillion's Nox Nyctores Bolverk has taken on the form of a pair of [[HandCannon Hand Cannons]], a minigun, a rocket launcher, a shotgun and a {{BFG}} that fires a massive laser beam at the opponent, to name a few.
* In ''VideoGame/CityOfHeroes'', The eponymous weapon from the Assault Rifle powerset seems to do everything but dispense mixed drinks.
** Specifically: semi-auto rifle, shotgun slug, shotgun buckshot, grenade launcher, beanbag, sniper rifle, flamethrower, fully automatic rifle and missile launcher.
* The SICW in ''VideoGame/ClassifiedTheSentinelCrisis'' is a transforming machine gun/sniper rifle/shotgun/grenade launcher/gatling gun/rocket launcher. It's supposed to be man-portable, although the person carrying it ''is'' wearing powered armor.
* The Playstation FPS ''VideoGame/CodenameTenka'' (or "Lifeforce Tenka" overseas) featured the "Self-Generating Polymorphic Armoury" or SG-26, an assault-rifle-sized weapons system that could shoot standard lead, lasers, grenades, missiles and mines, some of them upgradeable with various sub-modes (like dual and chargeable laser beams, and automatic rifle fire).
* ''[[VideoGame/{{Contra}} Contra: Shattered Soldier]]'': The director of the game wanted a new direction, so instead of starting with the machine gun and then finding power-up weapons - Bill and Lucia are given a weapon that has multiple firing modes - machine gun, spread gun and flamethrower which in turn have alternate firing modes when charged - homing missile, flying mine and a powerful fireball.
* The Service Weapon in ''VideoGame/{{Control}}'' is less an actual gun and more gun-ness manifest, taking on the shape of any gun its user envisions with [[BottomlessMagazines unlimited ammo]]. For Jesse, it can be a revolver, a shotgun, a submachine gun, a borderline sniper rifle, and a grenade launcher. According to the lore, it's closer to a SwissArmyWeapon, [[spoiler:theorized to have been fabled weapons like Excalibur and Mjolnir]], but that never appears in the game.
* Pandora from ''VideoGame/DevilMayCry4'' is a demonic briefcase which is able to change its configuration and is apparently bottomless. It can be transformed into a [[GatlingGood gatling gun]], an [[FuumaShuriken oversized three-bladed shuriken]], at least two types of rocket launchers of various efficacy, a [[WaveMotionGun big laser cannon]] and a floating platform [[MoreDakka laden with]] [[MacrossMissileMassacre rocket launchers]]. Overall, this briefcase has [[NumberOfTheBeast 666]] forms, but we get to see [[TakeOurWordForIt only the ones described above]] and the last-resort one, ''[=PF666=]: Omen'', which is activated by simply [[SealedEvilInACan opening up its lid]].
* In ''VideoGame/DonkeyKongCountry2DiddysKongQuest'', King/Kaptain K.Rool arms himself with a blunderbuss that while looking rather plain and ordinary, is able to rapid-fire massive cannonballs along with various types of debilitating gases that hinder the Kongs' ability to dodge his attacks. He's also able to use it as a jet to propel himself around the arena at high speeds and as a vacuum to draw the Kongs close so he can [[PistolWhip club them with its stock]]. The last function ends up working against him as clogging it up with a cannonball will cause it to backfire explosively.
** The king wields the same blunderbuss in his appearance in ''[[VideoGame/SuperSmashBros Super Smash Bros. Ultimate]]'', where it retains its multi-purpose nature, being able to fire cannonballs as well as vacuum up both enemy projectiles and opponents for use as ammunition.
* Every weapon in ''VideoGame/DoomEternal'' has two alt-fire functions, which the Doomguy can choose between by swapping out the barrel of the gun. Some of them simply increase the firepower of the primary fire via increasing damage or firing speed, but others have entirely separate weapons included:
** The Combat Shotgun includes an under-barrel grenade launcher.
** The Heavy Cannon has a pair of retractable micro-missile batteries that fire small explosive missiles.
** The Super Shotgun includes the "Meat Hook", a grappling hook that can stick into enemies and pull the Doomguy towards them, allowing him to fire point-blank in their face.
** The Chaingun has an energy shield that not only blocks projectiles, but also can be upgraded to launch forward to bash into enemies.
* ''Videogame/GunmanChronicles'' is made of this trope. It has little more than 6 actual weapons, but each weapon has at least 4 submodes, that can even have their own ''sub-sobmodes'': you can program a Rocket Launcher for firing homing or non homing missles, and sub-program said missiles to be high explosive, grapeshot, or attach to the surface as laserwire high explosive/grapeshot mines.
* ''VideoGame/HardReset'' has not one but ''two'' {{Swiss Army Gun}}s. One of them acts as a [[MoreDakka chaingun]]/[[GatlingGood gatling]] [[JackOfAllStats assault rifle]], a ShortRangeShotgun, a GrenadeLauncher, a [[StuffBlowingUp rocket/missile launcher]] and a minelayer. The other shoots bolts of energy, [[LightningGun a stream of energy]], [[BuffySpeak zappy electrical field grenade things]], a high-power pinpoint-accurate sniper mode with shots that penetrate walls, and explosive [[EnergyBall energy bolts]] that 'phase' through cover to find your target. Oh, and each mode has a SecondaryFire too.
* ''VideoGame/{{Iji}}'''s personal favorite nanoweapon, a Tasen Gen 2 Preloader, can form everything from a simple shotgun to a spray fire energy weapon to a giant laser to a repulsor to a [[NukeEm nuke]]. Perhaps noteworthy in that the player must [[HollywoodHacking trick]] the Swiss Army Gun into being able to utilize many of the more unusual configurations.
* In ''VideoGame/JakIIRenegade'', the Morph Gun starts out as a Shotgun, but gets mods that not only increase its normal stats, but also turn it into a Single-Shot Rifle, a Machine Gun, and a BFG. [[VideoGame/Jak3Wastelander The third game]] adds a ReflectingLaser, a Ground-Wave Generator, a LightningGun, an Anti-Gravity Generator, a Grenade Launcher, a Drone Launcher, a Homing Needle Gun, and a Pocket Nuke.
* ''VideoGame/JazzJackrabbit'''s long blue gun, the LFG-2000 Blaster, is designed to be compatible with most types of ammunition, conventional or otherwise. This includes plasma rounds, rubber bullets, freezing rounds, small homing missiles, large exploding rockets, flamethrower fuel, pepper spray, electric charges, even standard TNT.
* 10tons's ''VideoGame/{{Jydge}}'' features a character who's a mashup of ComicBook/JudgeDredd and Franchise/RoboCop. So it's fitting that its gun, the Gavel [=Mk1=] is the unholy offspring of a futuristic lever-action carbine, the [=FN SCAR=] and a steel sledgehammer. This makes it a gun that's awfully good at smashing skulls. The Gavel [=Mk1=] has different firing modes that not only turns it to a shotgun or assault rifle, etc. with unlimited ammo (but still needs reloading), but also lets it fire lasers, plasma and ion bolts as well. The Gavel [=Mk1=] can add a special weapon that lets it fire a limited number of rockets or [[StarfishRobot spider drones]] and other things. It can also house up to 3 different mods giving the gun abilities such as recovering health from killing and giving your gun better rapid-fire. The only drawback to the Gavel is that it can only switch out its settings when not on a mission.
* '90s game ''Meat Puppet'' from Kronos Digital Entertainment, features [[NinetiesAntiHero Lotos Abstraction]] who carries the Trigger Mortis - a gun that can fire rockets, bullets, nerve gas, tranquilizer darts and flames.
* ''VideoGame/MegaManClassic'''s iconic [[ArmCannon Mega Buster]] changes into the weapon of any Robot Master he defeats. In any one game, the Buster can function as a rocket launcher, flamethrower, ice gun, grappling wire, boomerang thrower, needle gun, and time manipulation device...just to name a few.
* Samus's ArmCannon from ''Franchise/{{Metroid}}'' certainly qualifies. It has been, among other things, a rocket launcher, grappling hook, freeze beam, shotgun laser, heat ray, and a recharge plug. The list just keeps growing with more games.
* Your character in ''VideoGame/NoMansSky'' only has a single Multi-Tool. Instead of acquiring new guns, you install modules into your Multi-Tool that weaponize it in different ways, such as a Boltcaster that turns it into an automatic gun, a Blaze Javelin that charges over a couple seconds and uses carbon as ammo, or a Plasma Spitter that functions as a grenade launcher. The Multi-Tool also accepts non-combat modules, such as the Mining Beam or the Terrain Manipulator, as well as non-offensive modules such as a force shield. You start with a small Multi-Tool with limited capacity for modules, and as you progress through the game, you can replace it with larger Multi-Tools that can accept more modules as well as more upgrades.
* In ''Videogame/{{Overwatch}}'', Widowmaker's rifle functions as a sniper rifle when using the scope or a machine gun when hip-firing.
* ''VideoGame/ParasiteEve'' featured a weapons customization feature that allowed you to take 'features' from other weapons and put them on whatever weapon you wanted. A NewGamePlus weapon might be a pistol capable of firing exploding bullets [[MoreDakka in three round bursts with shotgun-like spread]]. [[VideoGame/ParasiteEve2 The sequel]] featured a more realistic version of this, the [=M4A1=], which can accept any number of modifications ranging from rather benign attachments such as a bayonet or a magazine attachment to double the ammo count per-magazine, to the really fantastic stuff like an underbarrel armor-piercing laser or high-power paralyzing taser.
* In ''VideoGame/PerfectDark'', nearly every weapon in the game has a secondary function, some of which are quite unique. Eg. the Laptop Gun (SMG and automatic sentry), Dragon (assault rifle and proximity mine), K7 Avenger (assault rifle and threat detector), RCP-120 (SMG and cloaking device), etc.
* Captain Deadbeard from ''VideoGame/PlantsVsZombiesGardenWarfare 2'' has a ShortRangeShotgun that shifts into a SniperRifle whenever his crosshair is zoomed in.
* ''Project Clean Earth'' has the robot Bernard cleansing the Earth of hostile mutants. His main weapon is a longarm that always starts with a pistol but with the right modules it can then add a rifle, minigun, shotgun, sniper rifle and flamethrower. He fires all these simultaneously though because differing rates of fire there might be different bullet streams coming out. Bernard needs all these guns on one weapon because he doesn’t have many weapon slots, with the other main slot being reserved for Bernard's RocketPunch weapon.
* ''VideoGame/RedlineGangWarfare2066'' features such a weapon wielded by the protagonist. Besides the standard assault rifle mode, it can also become a [[ChainsawGood buzzsaw]] (with optional nitro upgrade that makes you fly around for a limited time), a rocket launcher, an EMP device (handy for those vehicles!), a shotgun, a grenade launcher, an alien goo shooter, a sniper rifle, and a {{hitscan}} plasma beam weapon.
** Creator/{{Accolade}}'s earlier TPS[=/=]FPS ''Eradicator'' also outfitted all three characters with Swiss Army Guns. In both games, to use the extra gun modes, you just collect the required ammo scattered throughout the levels-no need to collect prerequisite guns first!
* ''VideoGame/SaintsRowIV'': The "'Merica" gun. As its description says, it's "a dozen guns, a rocket launcher, and a flamethrower, all wrapped together behind one convenient trigger." [[SoundtrackDissonance Complete with patriotic music playing whenever it's held.]]
* In ''VideoGame/StarWarsTheOldRepublic'', the Republic Trooper class (no matter the Advanced Class choice) has this as a weapon. It can fire regular shots, an "explosive round", fire mortars, lay down a close AOE Ion Pulse, and can [[HealingShiv heal teammates]].
* ''VideoGame/StarWarsRepublicCommando'' cuts down the amount of equipment the characters have to carry by making the primary weapon modular, capable of swapping between automatic, sniper and grenade modes depending on which quick-change barrel assembly is currently attached.
* ''VideoGame/{{TAGAP}} 4'' features the [=AMM01=], aka the Adaptive Multi-Munition Weapon System 01. It can analyze different types of ammo to learn how to use them; this includes firing metallic scrap in a shotgun-like blast. On top of that, it can also act as a pulse rifle with infinite ammo, and can be upgraded to add a cryogenic or electrical effect to any shot it fires.
* The canceled ''[[VideoGame/CommandAndConquer Tiberium]]'' FPS would have included a transforming weapon as part of its basic design. Wielded solely by the player, the "GD-10" served as a basic assault rifle, grenade launcher, missile launcher, and ''personal ion cannon''.
* ''VideoGame/{{Vanquish}}'' has the BLADE-short for Battlefield Logic [=ADaptable=] Electronic-system, which scans weapons and uses the data to morph into said weapon. Of course, the hard drive only has enough data for three guns, which means to pick up a new weapon, the player must swap out the data of a currently-equipped gun.
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[[folder:Web Animation]]
* Parodied in ''WebAnimation/HomestarRunner'''s ''[[StylisticSuck Dangeresque]]'' movies. The titular AntiHero's weapon is the Nunchuk-Gun, which is basically a [[RevolversAreJustBetter revolver]] with a pair of nunchuks [[DuctTapeForEverything taped to it]].
* Most characters in ''WebAnimation/{{RWBY}}'' sport weapons that are great examples of Swiss Army Guns.
** And Velvet's weapon [[spoiler:is a HardLight version of any weapon she take a picture of. To fight a group of MiniMecha, she used in order: [[ImpossiblyCoolWeapon Ruby's sniper scythe, Weiss' revolver rapier, Yang's shotgun gauntlets, Blake's dual sword pistol, Coco's handbag minigun, Sun's nunchuk/staff pistol, Nora's grenade launcher warhammer and Penny's flying laser shooting swords]]]]
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[[folder:Western Animation]]
* Exaggerated in the ''WesternAnimation/AdventureTime'' episode "Varmints", where Princess Bubblegum uses a strange shotgun with a knob that adjusts between many bizarre firing modes: [[SlowLaser Slow Lasers]], [[TransformationRay projectiles that turn things into flashlight batteries]], force fields, and creating a ''second'' gun of the same kind that starts out fused at the barrel to the first one.
* ''WesternAnimation/AeonFlux'' has her FUG (Flux Universal Gun) which can use a line and grapnel, alternate between a sniper mode and full auto, and the FUG with a slight adjustment use nonstandard ammo like high-ex, drones, armor-piercing, incendiary and whatnot.
* In the ''WesternAnimation/TimeSquad'' episode "Nutorious", Tuddrussel gets a laser gun with tons of features. The problem? He has no idea how to use the laser gun part of it.
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[[folder:RealLife]]
* The Israel Military Industries (IMI) ''Galil'' assault rifle has a folding stock and folding bipod, which are typical for modern military rifles. However, the folding bipod also can be used as a wire-cutter, and the "ribs" under the forearm that hold it up in the folded position are designed to be used as a ''bottle-opener''. This latter function was because Israeli troops had the habit of using the feed lips of their rifle magazines to "pop the top" of soda bottles, which bent the feed lips and caused feed-jam malfunctions.
* Similarly, some military rifle bayonets (like the U.S. M9 bayonet for the [=M16A2=] rifle) are designed to be used as wire cutters; a hole in the blade near the tip slips over a lug near the end of the bayonet's scabbard, and the end of the scabbard has a "notch" for the wire. The whole thing works like a pair of pliers.
* Various modern assault rifles, including the [=M16A4=], the M4 carbine and the Beretta ARX-160, are designed to be field modifiable with a variety of [[GunAccessories attachments, using rails and hand-turnable screws to attach weapon mods to them, such as foregrips, grenade launchers, laser sights, flashlights, tasers, shotguns, red dot sights, and scopes]]... and that's just the stuff the military issues. There are third party mods for all sorts of things. Even better, the guns can be changed to fire a different cartridge with the push of a couple of pins and the replacement of the upper receiver and barrel, a trivial operation that can be completed in under a minute by an experienced user. If they could attach a Swiss army knife to the gun, they'd be set. (They can take bayonets, though. Almost there...)
* Although highly experimental/theoretical, both proposed liquid propellant and railgun designs could potentially vary the speed of their projectiles, by either changing the amount of propellant fed into the firing chamber, or the amount of charge used in its electromagnets, respectively. This could result in a gun that could effectively switch between being a submachinegun to being a sniper rifle with the flip of a switch- or switching from a low powered but quiet "stealth" mode to a high powered but noisy "magnum" mode.
* The [=XM8=] is a weapon that could fill a number of roles (assault rifle, designated marksman rifle, light machine gun, grenade launcher, compact carbine), however, the US military, its original user deemed it [[AwesomeButImpractical too expensive and not enough of an improvement]] to justify a complete change, or even [[MasterOfNone not as good as some guns dedicated to specific tasks]] (namely the light machinegun variant). The project was not a complete wash though, as the weapon and all its variants are now used by Malaysian special forces.
** This is actually OlderThanTheyThink, as the Steyr AUG and the Stoner 63 were designed with this kind of functionality. The Steyr can even be converted to an SMG.
* A GrenadeLauncher like the venerable M79 can fire tear gas, smoke grenades, illumination rounds and even ''buckshot'' in addition to fragmentation grenades. There is even a 40mm canister round being developed that fires a small wireless camera that slowly comes down on a parachute, linked to a helmet-mounted Head's Up Display or tablet device to allow a soldier to observe a large area without a drone.
* Shotguns have an equally impressive variety of specialist ammunition; less-lethal ammunition like beanbags or rubber buckshot, a round that works like a one-use miniature taser, distress flares... There's even the Dragon's Breath round, which basically turns your shotgun into a mini-flamethrower.[[note]][[AwesomeButImpractical And probably ruins the barrel after a few rounds.]][[/note]] And the FRAG-12 round, which fires a small high-explosive warhead.
* Similar to {{Grenade Launcher}}s and {{Shotguns|AreJustBetter}} above, {{Revolvers|AreJustBetter}} are also sometimes put into this category because the cycling action that doesn't depend on recoil and "random access" of their cylinders can more easily accept situational specialized ammunition by loading individual rounds than a magazine or belt-fed automatic weapon would use.
* The Beretta ARX-160 is designed to be easily and rapidly customizable. It's grenade launcher can be quickly detached and replaced with a bipod and it's barrel can be swapped out in seconds. This allows it to conceivably go from an assault carbine to a light machine gun or a marksmen's rifle during a fire fight if someone had the need and parts.
* The [=XM29=] OICW (Objective Infantry Combat Weapon) featured a 5.56 rifle platform with a 20mm airburst grenade launcher mounted on top as well as a revolutionary new scope with advanced electronics. And yes, [[EmergencyWeapon it could take a bayonet]]. Ultimately the project was canned for a variety of reasons. Weight and cost were obvious factors but even the grenade launcher [[AwesomeButImpractical wasn't deadly enough]] to really warrant it being there in the first place.
** Other countries have experienced with the same or similar concept as well, such as the Australian AICW (Advanced Individual Combat Weapon), the South Korean Daewoo K11 DAW (Dual-barrel Air-burst Weapon) and the Chinese QTS-11. However, most if not all of them fall victim to the same drawbacks as the [=XM29=], namely weight and cost.
* The Crossfire MK-1 was a combination gun (both rifle and shotgun), expected to be universally handy weapon, suitable for any circumstance. It was introduced in 1988 as semi-auto .308/12ga weapon, but actual production guns became pump-action and 5.56mm/12ga. Turned out that they are too expensive, unreliable and very uncomfortable to use.
* In the mid-1800s, Jean Alexandre [=LeMat=] invented a gun that was a combination revolver and shotgun. Its revolving cylinder held nine rounds, while the cylinder's core doubled as a smoothbore barrel holding a single round of 20-gauge buckshot. A tiny lever on the hammer controlled which barrel fired when the trigger was pulled: if it was up, the top revolver chamber fired, and if it was down, the shotgun barrel fired. [[AwesomeButImpractical It wasn't very successful]] for several reasons, but it worked, and (as with many bizarre guns) you can still get replicas of it today.

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