{{Game Breaker}}s in WideOpenSandbox games.
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* ''VideoGame/{{Terraria}}'' has so many items that are Game Breakers that [[GameBreaker/{{Terraria}} it has obtained its very own page.]]
* The Machine Gun from ''VideoGame/JustCause'' when fully upgraded (which won't take long). Perhaps it's an homage to action movies (which tend to glorify MoreDakka), but it is the best weapon in the game. It has ridiculous range (you can even ''snipe'' with it), a respectable rate of fire, can destroy helicopters and cars in seconds, has a high ammo capacity, and doesn't hinder your mobility like the Minigun (which actually is better in a few categories) does.
* Any [[HigherTechSpecies Polaris]] ship in ''[[VideoGame/EscapeVelocity EV Nova]]''. Ships built by the [[TheEmpire Federation]], the [[ProudWarriorRaceGuy Auroran]] [[TheAlliance Empire]], the [[LaResistance Rebels]], or the [[SpacePirates pirates]] are pretty evenly matched. One player reported he took down a Federation Carrier using a mass-modded[[note]]take a freighter with a good-size cargo bay, then use mass expansions to turn most of the bay into more room for weapons[[/note]] Pirate Enterprise freighter rigged for MoreDakka. But any Polaris ship eats its analogs from the other governments for lunch. In particular the Federation and Aurorans have no counter for the Polaris Raven other than [[ZergRush mobbing it]] and hoping for the best.
* Several throughout the ''VideoGame/GrandTheftAuto'' franchise:
** In general, mouselook on the PC ports of the various installments. You could fire machine guns and assault rifles with pinpoint accuracy, fire out of cars at enemies much more easily and pick targets far off with sniper-like precision, regardless of what weapon you were using. Using helicopters in all the entries after ''Vice City'' also allowed the player to avoid many of the problems that were specifically set up to hinder drivers - once you know where to get one, you'll never need to use a car again outside of required missions.
** The Hunter chopper. Vigilante missions are a lot easier when you have a death-spewing military attack helicopter to do them with. Play the mission for thirty minutes without resetting and you end up with more money than you can ever possibly spend.
** If you know where to look, you can obtain high-tier guns with plenty of ammunition and tons of explosives for free, long before they're available for purchase. These pickups respawn when you save or after six in-game minutes. When you're doing an early to mid-game mission when enemies come at you with handguns or UZI's, you can fight them with an assault rifle, an automatic shotgun or rocket launcher you didn't pay a single cent for.
** The M-16 in ''VideoGame/GrandTheftAutoIII'' was easily the most overpowered weapon in the game. Available early on, the M-16 shredded everything that stood in its path - cars, people, law enforcement, you name it.
*** The ''Vice City'' equivalent was the Minigun.
** In ''[[VideoGame/GrandTheftAutoViceCity Vice City]]'', collecting 30 hidden packages (which can be done right at the start of the game) gives a Colt Python spawn at Tommy's safehouse. It's a OneHitKill on most enemies, with the only drawback being a slower rate of fire.
** ''Vice City'' is also infamous for having a strict CashGate throughout the second half of the game. However vehicle challenges in the game grant you money that doubles every time you beat your best time. So by intentionally going slow once then gradually increasing your time you can get lots of money very quickly.
** ''VideoGame/GrandTheftAutoSanAndreas'' features a special gambling system linked to a luck stat, whereby you can only bet based on your gambling skill. It then tosses the whole thing out the window with Inside Track Betting, a horse racing gambling shop with no upper limit to bets. And one of them is right near a save point. So, bet the long shot, reload if it doesn't win, save if it does, and repeat this; you'll quickly have more money than you could ever possibly spend.
** ''VideoGame/GrandTheftAutoViceCityStories'': By taking over a few businesses, building High-Rollers and doing their missions early on, you can easily get 5-digit income every day... and you can speed through time by repeatedly getting Wasted or Busted. Combine this with the Minigun (although in all fairness, you can't get this until near the end of the game, but before that there are many other great weapons too), which thanks to your high income you can easily afford, and the game becomes a walk in the park.
** The automatic shotgun in ''VideoGame/GrandTheftAutoIVTheBalladOfGayTony''. All of the stopping power, no limited range and explosive shells means you can blow up a car or helicopter in just two hits. Far and away the best weapon in the game, and available early.
** VideoGame/GrandTheftAutoV Online brings us the Armored Kuruma, a vehicle that you won't even put a dent in without explosives, much less harm the driver. What sets it apart from the Rhino tank or the Insurgent is that the Kuruma is a personal vehicle; You blow one up, you have to pay for it, AND the game sets you up to be grouped with bad players. The Rhino's main drawback is its cost, and the Insurgent doesn't have reinforced windows, so you can still shoot the driver. The Kuruma ? Nope. Don't have access to explosives or a fast enough car to outrun it yet ? Have fun not playing free mode !
* Beating the Hitman missions in ''VideoGame/SaintsRow2'' will cause you to have unlimited rifle ammo. The Sniper Rifle can destroy a car in 2-5 bullets. Beating Corporate Warfare will give you unlimited RPG ammo, and can make those hard as hell car battles end in a few shots(did I forget to mention that getting the Annihilator will make things easier, and it still applies in a new game even if you didn't beat CW on the new save).
** That is ''nothing''. The game will also give you, as a present for defeating certain ''minigame missions'', an infinite ammo shotgun that can shred tanks and infinite ammo dual-wielded fully-automatic magnum pistols that can shred ''deities.'' This is just for beating minigame missions. Which are available the moment you step into the world. Meaning, in effect, the moment you leave the NoobCave, you can beeline for these specific minigame missions and ''become a God of Death before embarking on the storyline missions.''
** But what about some of the trickier vehicle-based missions, you say? Well, apart from those dual-Cobras devouring anything in the universe, you can also pretty easily get your Wanted level up to the utmost and look around - not too hard, honestly, they will be everywhere - for one of those Spec Ops [=APCs=] (the "Bear") with the mounted gatling guns on the top. Jack one (also easy, as most of them are being used for barricades instead of chasing you, for some reason) and get it to a safehouse. Voila! Problem permanently solved. Get it to a garage and soop it the fuck up and you're basically golden, what with having an armor-plated death engine with a mounted gatling cannon with default infinite rounds on the top. There is basically nothing in the universe that can stand against you. Haaaave fun!
* Several in ''VideoGame/SaintsRowTheThird'':
** Incendiary ammo for your submachine guns. Any enemy hit with even a single round is set on fire and takes continual damage, which means most ordinary grunts are going to die very rapidly. Non-[[DemonicSpiders Brute]] enemies are, furthermore, completely incapacitated, as they run around trying to put themselves out instead of shooting at you. And if a flaming enemy touches another enemy, that enemy also gets set on fire. This makes any gunfight in which your enemies stay grouped together (which is most of them) very easy.
** Oleg Kirrlov, one of your "homies," is a Brute who fights on your side, with all the benefits you'd imagine would come of having a nigh-invulnerable juggernaut (who can be rapidly revived and restored to full health if something does bring him down) at your command. The only downsides are that he's very big and will turn on you if hit with friendly fire and that he can only ride around in one specific kind of vehicle, so travel can be a bit of a pain.
** The SA-3 Airstrike, which you receive about halfway through the game. Pull it out, point it at a group of enemies, hold down the trigger for a few seconds, then step out of the blast radius. Makes gang operations and survival missions a breeze.
** One of your vehicle delivery upgrades is a tank delivery. Yes, an actual tank. On demand.
*** And later, you get a VTOL on demand. The Boss sums the vehicle up as being like "a helicopter that doesn't suck!"
** At around Respect 50, you can buy character upgrades that make you basically immune to everything except melee damage and being in a car when it explodes. Although, if you're at Respect 50, there's probably not much left the game can throw at you anyway unless you went out of your way to farm respect before doing anything else.
** [[BribingYourWayToVictory One DLC allows you to purchase a jet]]. An incredibly powerful jet that you can use to navigate the city at high speeds. It's only deployable in a very small number of areas (any place you can deploy a chopper), but it allows you to reach any destination in record time. Just don't forget where you parked.
* ''VideoGame/SaintsRowIV'':
** In a meta sense, the player is breaking the game to make it easier. Super jumps and super sprint are only the first such game breakers, making cars all but obsolete to get around.
** Believe it or not, the Dubstep Gun. Not only does it fires Dubstep instead of bullets, if fully upgraded, it can kill everything it stands in its path, with ''the power of exploding wubs'', making it into a continuous stream of explosions. Throw in Unlimited Ammo, and you can stroll through entire areas of the game with it. How strong? One or two good barrages can end a Warden, once you've used your powers to take down its shield.
** The second Telekinesis element drains enemies of their health, meaning health can almost always be replenished fully in moments.
** The Destructor tank can be added to your garage very early, can be summoned at any time, is NighInvulnerable, and shoots both rockets and lasers, making it ideal for both crowd control and precision-shooting. It is essentially '''the''' answer to any sort of ground-level combat, short of a warden fight.
** The Explosive Deaths upgrade combined with the fire element for the blast power. With it, when any enemy who's on fire dies, they let out an explosion, setting everyone around them on fire. The explosive effect can chain, so one blast can clear a large group of enemies if they're close together.
*** On a similar note, the Explosive element from one of the [=DLCs=], which pretty much make any fight with vehicles around a joke, as the Blast and Stomp will automatically explode vehicles when hit and the telekinesis power makes practically anything grabbed a grenade. Added with the above upgrade and entire waves of enemies can die with a single power.
** Freeze Buff. Any enemy who gets too close is [[ExactlyWhatItSaysOnTheTin frozen]] and takes double damage. Even ''[[EliteMook Wardens]]'' are rendered helpless against this buff and you can simply get in close (which normally would result in the Warden punching you across the block) and bash his head in with a melee weapon.
** Bling Buff. Anyone nearby is frozen into a gold statue for quite a while. Killing them in this form drops tons of cache, and cache is vacuumed towards you while the buff is active. It only takes a few enemies to rack up 100 000 cache, and it works just as well on pedestrians.
** The Tiny Pistol, despite its name, is an extremely powerful weapon that can cause a large explosion at whatever its pointed to, and can be used multiple times before it has to recharge. The only downsides are that recharging takes forever and its blasts cause the Boss to ragdoll as well, the later of which can be rectified by a high level upgrade. It can also be found early in the game if you know where to look. [[spoiler:By shooting open a door in Let's Pretend, and going down to a room where it's waiting on a chair]].
** 'Merica, particularly once you unlock unlimited ammo. A dozen guns firing at once ''and'' either a flamethrower or a repeating rocket launcher? The closest thing to a downside is its recoil; hold down the trigger, and the only thing you need to worry about is blowing yourself up if you aim at the ground. Combine it with Buff, and you can take down a Warden in ''seconds''.
* Early in ''VideoGame/RedFactionGuerrilla'', Sam will invent the Arc Welder. Buy it, upgrade it, and never look back. This thing will not only fry the three nearest enemies (either killing them or setting them up for a hammer blow), it can somehow distinguish friend from foe, making it safe to use around valuable [=NPCs=]. Most important, it'll kill the driver of ''any vehicle'', from the humblest car to the mightiest tank... leaving it undamaged for you to use. Many missions that would otherwise be tough are a snap with this glorified power tool.
* ''VideoGame/MountAndBlade'':
** Anyone on horseback, from the perspective of footsoldiers. [[FragileSpeedster Khergit horse-archers]] ([[PlanetOfHats which is to say, all Khergit troops]]) and [[LightningBruiser Swadian knights]] are particular offenders. TruthInTelevision, there ''is'', after all, a reason why horses as war animals are viable, and why a good part of war after these ages was still focused on anti-cavalry.
** [[MightyGlacier Nord Huscarls]]. Pack them in a tight group of 20-30 and they'll inflict ''massive'' casualties on anyone who is foolish enough to try and take them head on. And don't think you're safe doing hit-n-run either; their thrown axes are pretty much {{One Hit Kill}}s to anyone who isn't a plate-armoured knight.
** Rhodok Sharpshooters. They're armed with a Siege Crossbow which deals sixty-something damage per shot (in a game where 50-100 HP is common), and they hit with pinpoint accuracy. They're armed with a huge pavise shield (the only archers in the whole game to get shields) that stops the projectiles of your own units and makes them fairly decent in hand-to-hand as well.
** Vaegir Marksmen. Not as good in hand-to-hand and less powerful per shot as their Rhodok crossbowman cousins, but they shoot just as accurately and much ''much'' faster, and worse, [[ZergRush they often turn up in larger groups]]. Taking castles from any faction is tough, but taking Vaegir castles is ''nightmarish''.
** The Surgery skill. 4% chance per point that a unit will be knocked unconscious rather than killed. Doesn't sound like much, but remember that soldiers who survive battles and get experience are much stronger. Stronger soldiers are much harder to kill and much better at killing other soldiers, so you win more battles with fewer casualties. You win more battles, and you get more experience for your elite killing machines ''and'' your raw recruits due to LeakedExperience, and they in turn become much harder to kill... See how there's a snowball effect here? You only need about 3-4 points in the skill for a noticeable effect, and it becomes even more broken if you take up the Trainer skill as well, which allows you to distribute a small amount of experience points from just randomly marching around.
** Plate armour. So you move at the same speed as a pregnant whale when walking? So what when 5 out of 6 times you're hit, you won't take any damage!? [[LightningBruiser And you're probably riding a horse too]]! There's a good reason why plate armour is far and away the most expensive equipment in the whole game. Second-tier armours are far cheaper, and still increase your survivability ten-fold.
** In ''With Fire and Sword'', once you get enough money[[note]]Buying powder barrels at cities and selling them off at forts is a good way to accomplish this[[/note]], you can simply start commissioning caravans for the best possible profit, hire up a large amount of low-tier troops, set your group to escort the caravan (loading it with maximum cargo, minimum guards), and leave the game running until they arrive at their destination, where you can repeat this again and again until you're drowning in money. Once this is achieved, you can basically buy up a crapload of mercs, gear them up in the best possible equipment, talk to the weaponmasters and armorers at the cities to commission the most outrageously expensive ''and'' outrageously effective gear for yourself and your companions, and ride out, ready to take on the entirety of Eastern Europe. Sure, a little economic savvy is needed for the "caravan" step, but there's guides for that, and the game starts outright telling you the best deals if you have enough skillpoints in trading.
* ''{{VideoGame/Minecraft}}'': Giving the player the ability to fly in Survival Mode is a common addition in the many [[GameMod mods]] of the game. What most mod makers fail to realize is that in the vanilla game flight is restricted to Creative Mode ''for a reason''. On paper, flight would simply make navigation easier, when in reality it makes ''everything'' easier: combat, construction, movement, mining, you name it. Anything even remotely challenging in the game is broken in half by this ability. If a mod allows access to flight in Survival Mode, whether it's through an item and[=/=]or ability, then regardless if it's nerfed to oblivion or difficult to get, there's no reason not to try and obtain it as early as possible and no reason not to use it once acquired.
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