[[quoteright:299:[[VideoGame/{{Contra}} http://static.tvtropes.org/pmwiki/pub/images/CONTRA_BOSS_RARG_6780.jpg]]]]
[[caption-width-right:299:You'll never guess where you have to shoot.]]
[[BossBattle Bosses]] in VideoGames come in all shapes and sizes: giant monsters, giant robots, giant spaceships, and so on ... and then there are bosses who have no recognizable form whatsoever, taking an abstract (and usually mechanical) form distilled into two classes of elements: "Cores", the [[AttackItsWeakPoint weak points you must attack and destroy to defeat it]]; and "Turrets", the weapons that attack you during the process.

These categories can overlap; it's common to see components that are both a weapon to deal with and a weak point to destroy.

This manner of boss is often [[StationaryBoss stationary]], such as being part of a defensive barrier or a vital element of a structure -- and in the latter case there's a very good chance it's also a LoadBearingBoss.

ReactorBoss is a specific SubTrope, as the reactor is usually a core component itself and surrounded by various defensive turrets.
The BattleshipRaid also shares some similarities
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!!Examples

[[foldercontrol]]

[[folder: 3rd Generation or Earlier (NES, SMS, GB, etc.)]]
* The ''VideoGame/{{Contra}}'' series is known to include many of them. The first ''Contra'' game had one at the end of stage 1 (defensive building wall), stage 2 (and to get to this, more cores and turrets have to be blasted), stage 4(this time the main cores can only be hit when merged, and shoot homing projectiles), and stage 7.
** The sequel, ''Super Contra'', had these at the end of Stages 1 and 3 in both versions, and the NES-exclusive Stage 7.
* ''VideoGame/{{Zanac}}'' has one to six fortresses by the end of every level which consist of cores shooting stuff at player.
* ''VideoGame/TheGuardianLegend'''s first boss also is a boss with several turrets shooting football-shaped stuff at you.
* ''VideoGame/JourneyToSilius'' has one at the end of stage 3 which shoots tons of lasers.
* ''VideoGame/MegaMan2'' has Buebeam Trap which can become {{Unwinnable}} if crash bombs are wasted. Then there's Square Machine in ''VideoGame/MegaMan4'' and 'Rounder 2 in ''VideoGame/MegaMan6''.
** In ''2'', there's also Picopico-Master where the boss fight where multiple tiles merge in pairs and then chase Mega Man.
* ''Silent Assault'' for the NES has the 1st boss consisting of 2 turrets which fires some of the slowest (needle-shaped) projectiles ever. Then the second boss which consists of 2 gears and the fifth boss which is a giant computer ''with a mouth''.
* In ''VideoGame/BatmanSunsoft'' for the NES, one boss essentially boils down to forcing the Caped Crusader to punch a security system to death.
* The boss of each stage in the NES ''VideoGame/LegendaryWings'' is a moving wall with a core that opens and closes, and turrets that shoot eyeballs and shrimp-like things. The FinalBoss is a teleporting core surrounded by four turrets, similar to the final battles in the later ''Mega Man'' games.
* The Cheplin airship in ''Adventures of Tom Sawyer'', which is also an UnexpectedShmupLevel and BattleshipRaid.
* A more obscure game for the NES, ''VideoGame/{{Jackal}}'', consisted almost entirely of this kind of boss.
* ''VideoGame/{{Metroid}}'', of course, has Mother Brain. In most of the games she's appeared in, she just sits in a tank and lets her turrets and Rinkas do the fighting for her.
* ''Iron Tank'' has the Long Range Turret bosses and the base defense walls.
* ''VideoGame/StarSoldier'' has the Big Star Brains.
* ''VideoGame/{{Bosconian}}'' is one of the earliest examples of this type of enemy, but not in a BossBattle: you had to search every level to find the bases and destroy each base's core or the ring of six turrets surrounding it.
* The ''VideoGame/{{Xevious}}'' series has the {{recurring|Boss}} Andor Genesis and its FinalBoss variants.
* ''VideoGame/BlasterMaster'''s third boss is a room full of square [[TeleportSpam teleporting]] mobile turret-cores that become [[TurnsRed faster and more agressive]] as the battle progresses.
* Most of the bosses in ''[[SpyHunter Super Spy Hunter]]''.
* The FinalBoss of the SegaMasterSystem version of ''Quartet'' was a stack of five turrets.
* In ''Starship Hector'', the first and third bosses were of this type.
* The Technodrome in ''VideoGame/TeenageMutantNinjaTurtles''(NES).
* Also from Sunsoft, the final boss of ''Fester's Quest''.
* In ''Super Tank'' for the SG1000, the boss of every level has a core and seven turrets.
[[/folder]]

[[folder: 4th Generation (GEN, SNES, etc.)]]
* ''VideoGame/Sonic3AndKnuckles'' has a weird core miniboss at the end of Death Egg Zone act 1.
* ''Tank Force'', the sequel of ''BattleCity'', has a final boss which is composed of four 3-barreled turrets which fire projectiles at fast rate and speed, considering the genre of the game.
* Halberd's Reactor in ''VideoGame/KirbySuperStar'' is a good example. The core itself is actually invulnerable to Kirby's attacks; you have to lure the laser turret that occasionally appears into aiming at the core instead.
** The boss came back in ''VideoGame/KirbysEpicYarn'' during a spaceship scrolling stage. This time, your ship's fire could harm it.
* The CPU/Attacker/Defender inside [[spoiler:the Giant of Babel]] in ''VideoGame/FinalFantasyIV''.
* The overwhelming majority of bosses in the ''MetalSlug'' series fit this trope, though some are {{Colossus Climb}}s .
* ''VideoGame/ForgottenWorlds'' has the God Rah (4th boss), which is a giant Egyptian boat with several turrets, a closing-opening "door" and the hawk-headed god itself serving as the core one needs to shoot.
* ''VideoGame/ThunderForce II'' had free-roaming overhead stages in which the objective, much like ''VideoGame/{{Bosconian}}'', was to seek out the many-turreted enemy bases and shoot out their cores to destroy them.
* The recurring final boss of the ''VideoGame/{{Raiden}}'' games is a space fortress with a [[PowerCrystal red crystal core]] guarded by multiple turrets and sometimes smaller crystals. The crystal itself typically unleashes BulletHell on you for its [[TurnsRed final attack]]. It may have been inspired by the similar final boss in Toaplan's ''TwinCobra''.
* ''VideoGame/ZeroWing'' does this with the reactor boss at the end of Stage 5.
* ''SuperAleste'' has two examples: Lono, a grid of nine turrets at the end of Area 2; and Rubar, a Mode 7 spinning fortress at the end of Area 7, with six turrets and a core but only one attacking at a time.
* ''VideoGame/StarFox1'' and ''[[VideoGame/StarFox2 2]]'''s battleship reactors.
* ''Superman'' for the SegaGenesis has one of these at the end of Round 4.
[[/folder]]

[[folder: 5th Generation (SAT, N64, PS1 etc.)]]
* ''VideoGame/StarFox64'':
** Bolse is a prime example. First, there are shield generators protecting the core and the few fighters present, and once the shield is down, more fighters swarm out, followed by the appearance of the core (and the Star Wolf team, if they weren't defeated at Fortuna). At first, the enemy ships are the core's only defense, but each of the core panels turns into a laser turret once destroyed.
** To a lesser extent, the Saucerer, which is primarily a carrier ship but also has a core with a giant laser weapon which must be destroyed in order to save the Katina base.
* In ''VideoGame/BreathOfFireIV'', the main party is forced to wage combat against a computerized security system, which consists of two giant metal boxes that cast spells.
* A boss early on in ''VideoGame/{{Rayman 2}}'' is a weak version of this. It spits out bombs with small helicopter blades on top that fly towards you (no, really). To defeat it, you have to grab a "[[ExplodingBarrels keg]]" and throw it at one of three [[AttackItsWeakPoint cartoony bandages]] on the side of the machine. Doing this will power down the electric cage which has trapped [[DamselInDistress Ly]].
* ''VideoGame/{{Einhander}}'' has a ''[[http://www.youtube.com/watch?v=5WelBBsVEbQ#t=01m05s mook]]'' like this. Twice during the second level, you have to face off a [[CoolTrain massive train car]] with respawning turrets and a [[AttackItsWeakPoint control tower]]. To beat it, you have to destroy the control tower while being careful not to shoot down the radar on top, or else the tower will retract for a few seconds and come out with a new radar.
** However, if you want to get two secret bonuses, you have to shoot down enough of the respawning turrets until you obtain it.
* ''[[VideoGame/CastlevaniaLegacyOfDarkness Castlevania: Legacy of Darkness]]'' had the "Security Crystal" which consists of a large, central crystal and several self-repairing turrets of various types placed around it.
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[[folder: Other]]
* Every Die Spinne boss in ''VideoGame/CrimsonSkies: High Road to Revenge'' is some variant of this. All cores are electrified blue.
* In general, shmups made by Creator/{{Compile}} has this kind of boss. It's like a Compile trademark. In the earlier ones, like ''Zanac'', mentioned above, it's the only type of boss you will face (not counting the mini-boss ships that appear once in a while). The more advanced the boss, the more cores and turrets it has, until they fill most of the screen. And the more cores and turrets you have destroyed, the fiercer the rate of fire of the remaining ones. Fun times.
* ''VideoGame/MegaManZero 4'' first boss is the turret system defending the squad sent to destroy the caravan Zero is protecting. There is a [[{{Mook}} Pantheon]] merged into the core, but it doesn't move.
** There's also the MiniBoss Tyrine from the same game, surrounded by Glass Cannons (no relation to GlassCannon, they're pretty tough). Tyrine will shoot periodically while the Glass Cannons attack you, and if you destroy all the glass cannons, the main boss gets pissed. Destroying Tyrine ends the fight.
** In the first game, the boss of the train mission is the engine, which also has a [[{{Mook}} Pantheon]] merged to it.
* Monster X from ''VideoGame/CaveStory''.
* In the Registered version of ''VideoGame/RaptorCallOfTheShadows'', the Outer Regions set of levels features a number of non-Giant Ship bosses, all but one of them being heavily armed fortresses spraying generous helpings of [[EnergyWeapon plasma]], [[WaveMotionGun heavy lasers]], [[MoreDakka bullets]] and [[MacrossMissileMassacre missiles]] at you. And yes, the FinalBoss is also one.
* ''VideoGame/TalesOfSymphonia'': The Defense system, guardian of Toize Valley mine.
* ''VideoGame/DigitalDevilSaga 2'' has about three fights against security doors with turret duos with the last one havering a third turret that can put you in a world of hurt.\\
Fortunately, the third turret [[CallingYourAttacks announces its timing]], and you can learn a move that will reflect the move back at it...
* The ''{{Gradius}}'' series might as well be the TropeCodifier. "Destroy The Core!" is pretty much synonymous with the series and the Big Core is a major recurring boss series.
** One boss, first seen in ''Salamander/Life Force'', consists of a wall with three cores and half-a-dozen turrets and {{mook maker}}s.
** In some instances, the wall of cores and turrets you're fighting will ''charge at you.''
* Almost all of the bosses in the sixth-gen ''StarWars: RogueSquadron'' titles (Imperial Star Destroyers in both, two versions of the Death Star in ''2'' and the ''Executor'' in ''3'').
* ''VideoGame/{{Portal}}'':
** Genetic Lifeform and Disk Operating System (GLaDOS) is a textbook example of this trope. [[spoiler: While you don't actually shoot AT the Cores, they must be removed and destroyed by way of an [[MurderByCremation Aperture Science Emergency Intelligence Incinerator]]. Meanwhile... oh look! It's your old pal, the Rocket Turret! (Who, thanks to the power of portals, is instrumental in your attacks on [=GLaDOS=].)]]
** In the sequel, ''VideoGame/{{Portal 2}}'', GLaDOS takes this a step further by assuming the position of BadBoss of a modified Personality Core (Atlas) and Turret (P-Body), two robotic test subjects, making her [[IncrediblyLamePun the Core and Turret's Boss]].
** Inverted with [[spoiler:Wheatley]] in the sequel. Hitting the boss stuns it, allowing Chell to attach another core, in order to corrupt the primary core.
* ''VideoGame/ResonanceOfFate'' has one in the penultimate chapter. Lots of turrets, one core.
* The [[spoiler:David Archer]] VI, the final boss in the ''VideoGame/MassEffect2'' DLC "Overlord".
* ''VideoGame/Rockman4MinusInfinity'' has the Serges Devil, which combines the PlatformBattle with this trope.
* For the final boss of ''VideoGame/DeusExHumanRevolution'', we have the [[spoiler: Hyron core. The "Cores" of this CoresAndTurretsBoss are actually [[PoweredByAForsakenChild human women]].]]
* ''VideoGame/LaMulana'' does this in a way with Viy, whose turrets take the shape of tentacles and can only be temporarily disabled. The remake makes them conventional CombatTentacles instead.
* The Chapter 4 boss in ''VideoGame/{{Ikaruga}}'' includes a shielded core surrounded by beam turrets that alternate in polarity while firing, and the core itself attacks with a laser beam [[TurnsRed once its shields are down]].
* ''VideoGame/StarWarsBattlefront'': In space combat the large capital ships can be destroyed by attacking their shields and core components while avoiding the turrets.
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