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1->''"Master, I have completed the design for base security; these doors only open when you hit them with the Flaming Sword!"''\²''"But no one in my army uses flaming swords."''\²''"'''That's what makes it secure!'''"'' ²-->-- A conversation between a constructor of a SupervillainLair and his boss in ''WebAnimation/ZeroPunctuation,'' ''VideoGame/Strider2014''²²One way to control the plot of a video game is to place [[BrokenBridge barriers]] in the hero's path. A destination may be unreachable without access to water transport because the main character has SuperDrowningSkills. You may need to become immune to fire before moving on because the next level is set in a FireAndBrimstoneHell environment. Perhaps you need to enlist the help of a specific NPC, or acquire a specific item, in order to get past the annoying guard.²²Sometimes, the item, ability, or skill isn't needed again. But, in other cases, it becomes a key part of the main character's inventory, and gets used all the time. Another example: you can't get to the other island without a ship, so any plot event that happens on the other island can ''assume'' you have a ship. Thus, the game developers suddenly start throwing quests at you that require you to hop back and forth between islands like a bored tourist, and continue to do so for the rest of the game. In extreme cases, the entire game dynamic may change after you obtain this one critical item or ability, because you are now well-equipped/powerful enough to handle challenges that would have been insurmountable before.²²This is a subtrope of BrokenBridge. While Broken Bridges railroad you to the plot by requiring that you complete certain tasks before new areas open up, this trope is about railroading you to the plot by requiring that you have the necessary skills and abilities to move forward and open up new areas. This trope is a staple of the {{Metroidvania}} genre of video games, though it shows up in other genres as well.²²See also ButThouMust. For something that requires you to be at a certain level to proceed before it kills you, see BeefGate. When this is combined with an offensive ability it's a UtilityWeapon.²²----²!!Examples²²[[foldercontrol]]²²[[folder:Action-Adventure Games]]²* In the PC version of ''VideoGame/HarryPotter and the Chamber of Secrets'', you cannot get into some game areas until you are taught specific spells in class.²** You cannot use Spongify pads to jump until you are taught the Spongify spell, but various Spongify pads outside the castle are visible throughout the game.²* In the arcade game ''Bubbles'' you control a scrubbing bubble in a sink, and advance to the next level by sending your bubble down the drain. But you have to grow your bubble big enough before you can go down the drain; if the bubble is too small, it'll pop.²* ''Franchise/TheLegendOfZelda'':²** As a series hallmark, almost every dungeon in the series from ''[[VideoGame/TheLegendOfZeldaALinkToThePast A Link to the Past]]'' onward will have puzzles that can't be solved without the item found in their respective dungeon and bosses will probably need you to use that item to beat them. In addition, one dungeon's item may be required to enter the next dungeon (or even sometimes the section of TheOverworld it lies in).²** ''[[VideoGame/TheLegendOfZeldaALinkBetweenWorlds A Link Between Worlds]]'' averts this trope by having all key items in a store waiting to be purchased, while ''[[VideoGame/TheLegendOfZeldaBreathOfTheWild Breath of the Wild]]'' averts it by giving you every essential puzzle-solving ability in the introductory area.²** A common design is to use this trope to hide a BrokenBridge. For example, in [[VideoGame/TheLegendOfZeldaOracleGames Oracle of Ages]], the second dungeon gives Link Roc's Feather, which gives him the ability to jump. To get to the third dungeon, he is required to have an NPC build him a raft to access the island the dungeon is on. There are some pits Link must jump over to access raft-builder's house, requiring Roc's Feather. If Link leaves the second dungeon after obtaining Roc's Feather but without completing the rest of the dungeon, he will be unable to obtain the raft, despite being able to talk to the NPC. Most players will never see this BrokenBridge, as leaving the dungeon half way through would not occur to them.²** Notably averted in ''VideoGame/TheLegendOfZeldaI''. All of Hyrule, save for two screens[[note]]screens in which you need to have the Raft to access[[/note]], can be explored from the start. [[BeefGate Doing so, however, is likely to get you killed.]]²** The trope is prominent in the remake, ''BS Zelda no Densetsu'', where it interestingly combines with BrokenBridge. Certain obstacle-clearing items or events only appear or occur during certain broadcast weeks (for example, the Candle is needed in order to access the western portion of the map, but is only sold after the first week). One could wait until a later week and try to sequence break, but this defeats the purpose anyways, and the player only having one hour a week, or certain items becoming [[PermanentlyMissableContent unobtainable]].²* Used very frequently in ''Videogame/{{Okami}}''. There are places very early on in the game that require some of the final Brush Techniques to enter.²* In a LampshadeHanging fashion, ''VideoGame/SuperMetroid'', like many other {{Metroidvania}} games, forces you to use the item/powerup to escape the very room you got it in. Just got the High-Jump? Why, look there. You can only get out of the room by ''using'' the High-Jump. Unless you do some SequenceBreaking techniques, that is.²* ''Franchise/{{Castlevania}}'' games generally tend to give you the DoubleJump fairly early - you'll need it constantly for the rest of the game. However, many of the upgrades are also used only once or twice.²* In ''VideoGame/BeyondGoodAndEvil'' there are locked doors and other obstacles that require a certain tool (or hovercraft equipment, or sidekick) to overcome. Sometimes, the item needed to escape from a room can be conveniently found in the same room.²* Applies not to you, but to your minions, in ''VideoGame/{{Overlord}}''. Can't pass fire without red minions, or poison without green ones! You can go through water, but only blue minions can safely follow you, and if there's a gate-opening wheel on the other side you're just too lazy to turn it yourself.²* The same principle is used with the pikmin in ''VideoGame/{{Pikmin}}''. Blue pikmin can swim, red pikmin are fireproof, yellow pikmin are immune to electricity, and white pikmin can breathe poison. The ability barriers go further in some cases; one boss in the game can only be damaged after getting hit by a purple pikmin.²* Seen in the ''VideoGame/{{Onimusha}}'' series: the [[VideoGame/Onimusha2SamuraisDestiny second]] and [[VideoGame/Onimusha3DemonSiege third]] games have certain doors protected by a colored, tumor-like Genma called Mozun. In order to unlock said areas, you have to find the right Oni Weapon and use it (examining the Mozun will always tell you what kind of elemental Oni Weapon you need). The fourth game, ''[[VideoGame/OnimushaDawnOfDreams Dawn of Dreams]]'' has certain levels containing special locks or iron doors or walkways that can only be used by one of your party members.²* The exploration gameplay of ''VideoGame/{{Aquaria}}'' is wholly built upon this. You spend most of the game collecting abilities and shapeshift forms that let you explore previously inaccessible areas, most of which are linked to the starting zone. This actually forces your progression into a more or less linear path. For example, near the beginning, you get a telekinesis-like ability, allowing you to explore passages blocked by boulders -- by pulling them away. In some other passages, your path is blocked by currents streaming towards you; you move on to explore them after learning a form in which you can swim against currents.²* In ''VideoGame/TombRaiderAngelOfDarkness'', Lara periodically has to receive skill upgrades (grip strength, running speed, etc.) to overcome obstacles as the game progresses.²* ''Videogame/TombRaider2013'' was set on one big island location. However, Lara was unable to explore new areas until she acquired the required gear to proceed. As these were found as the story went on, they could also count as PlotCoupons²* In ''Hellfire'' (an expansion pack to the original ''VideoGame/{{Diablo}}''), you cannot reach the insect hive until the farmer character knows you well enough to talk to you about his problems (and then to give you the explosives you need to create an entrance to the hive).²* Happens several times in the ''VideoGame/LegacyOfKain'' series.²** In ''Blood Omen'', the Wolf and Mist forms could reach inaccessible areas, the Disguise and Beguile forms could be used to interact peacefully with humans, and the Energy Bolt and Control Mind spells could be used to press inaccessible switches.²** In ''Soul Reaver'', Raziel generally needed the ability gained from each of his brothers to reach the next one.²* ''VideoGame/{{Strider}}'':²** The [[Manga/{{Strider}} NES game]]: Flashing red wall? You need the Magnetic Boots to walk up it. [[GrimyWater HP-draining water]]? Requires the Aqua Boots, which you must WallJump to reach. Uncrossable spike pit? Jumping upgrade required to proceed. Low passageway? You need to acquire the sliding ability.²** Returns with a vengeance in the [[VideoGame/Strider2014 2014]] remake. Closed-off vents? Get that SlideAttack! Icy-blue spinning doors? Need the [[AnIcePerson Ultra-Cold Cypher]] to freeze them. Yellow-glowing doors? Must use the [[FlamingSword Explosive Cypher]] to burn through. Suspiciously weak grates in the ground? Gotta pound 'em with [[DeathFromAbove Downstrike]]! Purple magnetically-locked doors? Guess this Magnetic Cypher will come in handy!²* In ''VideoGame/BlasterMaster'', the passage to each subsequent stage requires an upgrade earned by defeating the Mutant Boss of the current stage. ²* The ''VideoGame/BatmanArkhamSeries'' games use this to prevent sequence breaking. Notably in the first game, he left his Explosive Gel ''in the trunk of the Batmobile''.²* The VideoGame/{{LEGO Adaptation Game}}s give you characters with the required abilities to beat each level of the story mode, but almost all of the hidden collectibles require an character with a different ability to be unlocked and this used in Free Play/roaming the hub world.²* ''VideoGame/SubNautica'' accomplishes this by making several areas impossible or at least severely impractical to access without the right equipment. For example most obviously, extensive exploration of deep underwater biomes becomes easier after you craft an air tank, then a bigger tank, then a rebreather and then finally submersibles. Another example is the wreck of the ''Aurora'', which requires a lead-lined diving suit to protect from the radiation leaking from the ship's damaged fusion reactor.²* The metroidvania ''VideoGame/LaMulana'' has plenty of this, but also has a [[GuideDangIt particularly evil subversion]]: the [[spoiler: Scalesphere]] can only be obtained after passing through a [[spoiler: pool of water]] that [[StupidityIsTheOnlyOption drains your health due to you not having the item]]. This is actually ''more'' likely to trip up experienced metroidvania players, who will assume the item needs to be found elsewhere before proceeding (unless they're the type to attempt SequenceBreaking on the first run).²* In ''VideoGame/{{Carrion}}'', several entrances from the [[HubLevel Frontier area]] to other areas require abilities gained from earlier levels, such as [[InvisibilityCloak Photokinesis]] from the Botanical Gardens to bypass the door sensors that shut the entrance to the Leviathan Reef Base if tripped.²[[/folder]]²²[[folder:Eastern RPG]]²* In the ''Anime/DragonBallZ Legacy of Goku 2'' and ''Buu's Fury'' games for the UsefulNotes/GameBoyAdvance, certain areas can only be entered by certain characters having reached certain levels. This is evidenced by the number they must be at, bearing a color associated with the proper character (blue for Vegeta, green for Piccolo, orange for Goku, etc.).²* ''VideoGame/FinalFantasyIII'' has a `you must be this short to enter' feature -- certain areas are accessibly only through tiny doorways, only available once a member of the party has the 'mini' spell.²** ''VideoGame/FinalFantasyThe4HeroesOfLight'' has a similar routine using the Transform Staff.²* ''VideoGame/MarioAndLuigiSuperstarSaga'' also has some areas that are blocked off or otherwise inaccessible until the brothers have learned some ability.²** This gets particularly annoying in later game ''VideoGame/MarioAndLuigiBowsersInsideStory'', where the Bros are simply [[BagOfSpilling remembering moves they knew in previous games but mysteriously forgot]]. They don't remember the first time you find an appropriate obstacle, oh no; you have to wait until the plot gets to the right point, and then backtrack later.²** In Toad Town there's a ''shop'' which won't sell the Bros gear until their rank (based on experience level) is high enough. Leaving aside the usual question of [[NoHeroDiscount why you're being charged for equipment when you're on a mission to save the Princess]], let's think about that for a second. If Mario and Luigi aren't high enough level to shop here, ''who the hell in the Mushroom Kingdom is''?²* ''[[VideoGame/PaperMario64 Paper Mario]]'', ''VideoGame/PaperMarioTheThousandYearDoor'' and ''VideoGame/SuperPaperMario'' has this with the obstacles cleared by partners' abilities.²** The first two ''Paper Mario'' games also have upgrades for Mario's Boots and Hammer. The Boot upgrades enable Mario to perform a GroundPound, as well as jump higher. The Hammer upgrades allow Mario to break sturdy blocks in his path.²* During the first six generations of ''Franchise/{{Pokemon}}'' games, HM moves were {{Utility Weapon}}s necessary to reach plot-specific areas. Each game has certain cities and localities you can only reach once you have taught one of your Pokémon a certain HM and gained the Gym badge that allows you to use it outside of battle. Every entry that requires [=HMs=] has Cut as mandatory for the main story[[note]]in ''Black and White'', every other HM is only used to reach optional items or locations[[/note]], with Surf and Strength being close behind. However, you can obtain Pokémon that know the HM moves by trading instead of finding the HM, allowing for some minor SequenceBreaking, such as skipping the S.S. Anne in Gen I. Many players use a designated HM slave or two to carry the required moves, as while some are powerful attacks you'd want on your Pokémon (Surf is one of the most powerful Water-type moves in the game), others are near worthless (in battle, Flash was a 70% accuracy status move during Gens I-III, with much better moves being able to do the exact same thing). On top of that, you can't just overwrite them with another move; you need to talk to a special NPC you generally meet late in the game in order to delete any HM moves.[[note]]Said NPC didn't even ''exist'' in Gen I, meaning whoever you taught the HM move in those games was forever stuck with it.[[/note]]²** From the seventh generation onwards, you no longer need to teach your Pokémon HM moves. This trope still remains in play, however, as you now receive separate items or abilities (such as Ride Pokémon) that accomplish the same goals without using up moveslots. Meanwhile, former HM moves became TM moves that can be freely taught and removed from a Pokémon's moveset.²** ''VideoGame/PokemonSwordAndShield'' limits what creatures you are allowed to capture in the [[BeefGate Wild Area]] depending on the amount of badges you have.²* A mainstay of the ''VideoGame/WildArms'' series where characters use tools to pass certain obstacles. The location where they are introduced often requires extensive use of the tool which was never required before that point.²* ''VideoGame/PhantasyStarIII'' makes use of caverns to transport your party between various worlds. To keep you from [[SequenceBreaking advancing too far too soon]], several of them are locked and require specific gemstones to enter; you acquire those either from InexplicableTreasureChests or from recruited party members.²* Constantly in ''VideoGame/RadiantHistoria''. Need to defuse magically-hidden bombs? Swap timelines and learn to see invisible things. Need to sneak into a heavily-guarded area unnoticed? Swap timelines and trick a villain into showing off his TeleportSpam so you can [[PowerCopying copy it]]. Need to find a way to bypass an enemy's ability to paralyze you? Swap timelines again and talk someone who's beaten him into teaching you how they did it.²* ''VideoGame/ChronoTrigger'' requires you to get the Epoch, a time machine that allows you to travel to a time period that has been otherwise sealed off from you. Once you have it, and especially after it is later upgraded, it allows you to clean up the remaining {{Side Quest}}s and {{Bonus Dungeon}}s much more quickly.²* ''VideoGame/GoldenSun'' features various psynergy (psychic-magic) powers that are required to solve puzzles or remove barriers. Most notable is Grind from [[VideoGame/GoldenSunTheLostAge the second game]], which is almost never used after its first use to break the rock barriers that separate the oceans.²** Similarly, Lift is used maybe once or twice to get into Magma Rock, which [[VideoGame/GoldenSun2001 the first]] used quite a bit more.²* ''VideoGame/EpicBattleFantasy'': Used in ''VideoGame/EpicBattleFantasy4'' and ''VideoGame/EpicBattleFantasy5''. The axe, torch, hammer, ladder, and three kinds of boots will be obtained throughout the games. Deliberately patterned after ''Franchise/{{Pokemon}}''.:²** ''VideoGame/EpicBattleFantasy4'': You even get achievements called "Used Cut", "Used Flash", "Used Rock Smash", and "Used ...Ladder?". Non-player characters at Goldenbrick Resort in ''[=EBF4=]'' call the stepladder "legendary" since there is only one in the entire world.²** ''VideoGame/EpicBattleFantasy5'': which adds an additional number of items such as the shovel and a second type of hammer, but also the items that are necessary only for extra loot, like the Cloud Boots.²[[/folder]]²²[[folder:First-Person Shooter]]²* ''VideoGame/HalfLife2: Episode One'' used this relatively early. To make sure you have a gun, the door has a padlock and you don't have a crowbar. Mainly done to ensure people picked up the gun right by the door, since it is a bit dark in there, and it could go unseen. The commentary reveals that the dev team calls this a "gate". And, ironically enough, there's an achievement in the game for grabbing that gun, hitting the padlock with it, and then ''never using it or any other bullet-shooting gun for the rest of the game'' -- it's called "The One Free Bullet" and literally everything else that happens can be taken care of with controlled application of a crowbar, [[WreakingHavok gravity gun]], or explosives.²* ''VideoGame/BioShock1'' has specific obstacles in the game that require you to find a certain plasmid in order to progress to another area, like the block of ice that needs to be melted by finding the Incinerate plasmid.²* Shortly after acquiring the Leichenfaust 44[[note]]a combination BFG and Gravity Gun[[/note]] in ''VideoGame/Wolfenstein2009'', the player must use it to lift a gate they need to pass through to get to the rest of the level.²* The second to last level of ''VideoGame/WolfensteinTheOldBlood'' requires the player to use the Laderoboter, a utility walker found at the beginning of the level, to smash through various gates. The player abandons the vehicle immediately after completing the level.²* ''VideoGame/WolfensteinTheNewOrder'' has a wide variety of chains, metal plates, and fences that must be cut through with the Laserkraftwork, and only start appearing after you get your hands on it.²[[/folder]]²²[[folder:Platformer]]²* In ''[[VideoGame/BanjoKazooie Banjo-Kazooie]]'', you cannot so much as get into Gruntilda's Lair without knowing all of Bottles' moves from Spiral Mountain. Not that they're needed to actually get inside; [[NPCRoadblock Bottles himself simply will not let you enter the lair if you don't know them]]. This is really for your own good, as you wouldn't be able to accomplish very much without them. Played straight with the Talon Trot, which you need to get beyond the first section of Gruntilda's Lair. You also need the Shock Spring Jump in order to open Clanker's Cavern.²* ''Banjo-Tooie'' does this to limit progress through the HubLevel. You need to have learned Grip Grab to get into Plateau, Fire Eggs to get into Pine Grove, Split Up to get into Cliff Top, Talon Torpedo to get into Wasteland, Springy Step Shoes to get into Quagmire, and Claw Clamber Boots to enter the Cauldron Keep. Even the in-game cheats don't get around these requirements.²** The Zubba hive in Cloud Cuckooland presents a variation. You're not allowed in unless you demonstrate you can shoot a target 20 times in 10 seconds, which effectively means You Must Be A Bee To Enter.²* While levels that ''require'' an ability to clear always give you the ability right before you need it, [[VideoGame/SonicTheHedgehog Sonic]] games since ''VideoGame/SonicColors'' have generally had bonuses hidden behind gates and platforms that need clever applications of the games' various abilities use to breach. Since they're one use, this often requires picking up an ability and then finding a way hold onto it instead of using it when you're otherwise supposed to. In Colors, this would also mean passing by paths you can't access the first time you play a stage, and then replaying it again after unlocking that ability in a later stage.²* In the second level of ''VideoGame/LittleNemoTheDreamMaster'', Oompi says, "You're going to need the lizard's help to get through this next area." This alludes to a passage that is otherwise too narrow for Nemo to enter.²* In ''VideoGame/MegaMan1'', you don't need to pick up the Magnet Beam in Elec Man's stage to beat Elec Man, but you do need it to finish the first Dr. Wily stage. And since it's stuck behind some blocks that can only be broken with Elec Man's or Guts Man's powers, you either need to beat Guts Man first, or play through Elec Man's stage twice.²** From ''VideoGame/MegaMan2'' on, any required item is earned by beating a Robot Master, thus ensuring the player has all the tools necessary to complete the game. Later games featured additional items the player can find or purchase, but they're not strictly required.²* In ''VideoGame/TheAdventuresOfRadGravity'', [[NewWorldTease Volcania is accessible after completing Cyberia]], but you can't progress there until you have the Teleport Beacon from much later in the game. Sauria and Turvia can be completed in either order, but the boss of Vernia can only be defeated with the Crystals from Sauria.²* ''VideoGame/Spyro2RiptosRage'' had this in the form of swimming, climbing, and the headbash move. The abilities had to be purchased from Moneybags in order to complete each hub area, and some orb sidequests also required them, meaning you may occasionally need to backtrack to previous areas for 100% completion.²* Happens fairly often in ''Franchise/RatchetAndClank'' via Gadgets that are required to beat certain level paths, especially in the first three games. Players who are thorough with level exploration however never encounter this as they find the required gadgets and Infobots well beforehand through the course of normal play.²** [[VideoGame/RatchetAndClank2002 The first game]] in particular has a chain that can stretch across half the games levels if you didn't play them thoroughly. To get to planet Hoven, you need to find the Infobot on Orxon as Ratchet. To do that, he needs to pick up the O2 Mask on Pokitaru via a minigame. That minigame needs the Pilot's Helmet, which is found on planet Gaspar. The Infobot with the co-ordinates to Gaspar is on Batalia, but you need the Grind Boots to get to it. The Grind Boots are bought from a scientist who is found on the Blarg Tactical Research Station.²** Also in the original game, players will have a 50/50 chance of running into this early in the game. Novalis has two paths which unlock new worlds, one to Metropolis and one to Aridia. However to complete all of Aridia's three paths, you need the Swingshot, which is found on Metropolis. To make the issue worse, Metropolis unlocks Eudora at the end of one of its paths, which requires the Trespasser to beat. Where do you find that? Why, at the end of the path on Aridia that needs the Swingshot, of course! Needless to say, unless you've memorized the level order and logistics perfectly (or just play through all of the paths), there's a high chance you'll run into this issue.²** In ''[[VideoGame/RatchetAndClankGoingCommando Going Commando]]'', to get access to Planet Siberius, you need to do a lot. On Oozla, you need to go right for the Tractor Beam, and left for the coordinates to the Maktar Resort. On Maktar Resort, you can go right and use the Tractor Beam to solve some puzzles and get to the Jamming Array, which gives you the coordinates to Barlow, while going left and doing the tournament will give you the Electrolyzer, as well as the coordinates to Endako. On Endako, the right path takes you to Clank's apartment, where you can find the [[GrapplingHookPistol Swingshot]] and GrindBoots, while the left path, which requires the Electrolyzer, will allow you to rescue Clank. On Barlow, going up the ramp will take you to a section where you need the Swingshot, and continuing that path will allow you to buy the Thermanator, while the cave path ends in a DoorToBefore next to a gap that you need Clank to jump over. Completing the Hoverbike race that's across the gap will give you the coordinates to the Feltzin System, and completing that will give you the coordinates to Notak. On Notak, going across the bridge and following the path will take you to a room that you need the Thermanator to complete, and it will eventually continue to a chemical factory that you also need the Thermanator to complete. At the end of the factory, you can finally buy the coordinates to Siberius.²** In ''VideoGame/RatchetAndClank2016'', you need to find the Hydrodisplacer on Aridia to get through the sewers in Blackwater City and get the Trespasser, which you need to get through a door on the Blarg Tactical Station. You'll also need the Thruster-Pack to get through Kalebo III, due to a Thrusterbolt that requires it.²* In ''VideoGame/BionicCommando'', different groups of Areas require specific Communicators (which you must select at the beginning of a level in the NES version, unlike in the remake, where they are automatically equipped) to unlock their doors, you need the Flares to illuminate [[BlackoutBasement Area 4]], Area 14 requires a passcard to enter, Areas 6 and 7 are blocked by barriers that require the Rocket Launcher and 3-Way Gun, respectively, to pass, and Area 3 in the remake requires that you have the Power Claw [[AnachronicOrder from Area 6]].²* ''VideoGame/OriAndTheBlindForest'' uses this trope in typical Metroidvania style. For sheer-walled shafts you need the WallJump or Wall Climb; to break the blue barriers you need [[ChargeAttack Charge Flame]]; other-colored barriers need to be destroyed by a like-colored enemy or their projectile, sometimes via the Bash ability; to cross large spike pits or gaps you need DoubleJump, Bash, Glide, or a combination of all three; and for the wooden post switches and certain breakable floors you need the GroundPound. Furthermore, in the UpdatedRerelease, certain secrets in the main game are locked until you have the new Dash and Light Burst abilities acquired in the BonusDungeon.²[[/folder]]²²[[folder:Puzzle Games]]²* This is literally the case in the ''VideoGame/KatamariDamacy'' series; the larger your katamari becomes, the larger the stuff you can roll up. Levels frequently have barriers with signs on it stating a size number, which you can't roll up (or thus explore beyond them) until your katamari crosses that threshold.²* In ''VideoGame/{{Antichamber}}'', it is mostly played straight with the different block guns. SequenceBreaking is possible, but it tends to require considerably more ingenuity and dexterity than the intended solution.²* Humorous example in ''[[VideoGame/DeadlyRoomsOfDeath DROD: Gunthro and the Epic Blunder]]''. In this {{Prequel}}, the player controls Beethro's grandfather Gunthro, within a FramingDevice of Beethro narrating Gunthro's adventures to his nephews. At one point Gunthro needs to cross shallow water, and Beethro suddenly remembers he could do this all along. In the next chapter, Gunthro needs to return to his homeland and deal with some infiltrators. The entrance to their hideout is in a room he passed through before, blocked off by shallow water.²[[/folder]]²²[[folder:Roguelike]]²* To descend into the deepest parts of the main dungeon in ''VideoGame/AncientDomainsOfMystery'', the player needs to pass a wall of fire blocking the down staircase, which requires an artifact called the Chaos Orb of Elemental Fire that is also required in the endgame. And it's just as well that the wall forces the player to [[strike: be that tall]] get the Orb, because otherwise no sane person would enter the Tower of Eternal Flames where the Orb, massive equipment destruction, and rapid immolation for the newbie player resides.²* Earlier versions of ''VideoGame/NetHack'' had an endgame set in Hell, and if you entered it without Fire Resistance you were instantly burnt to a crisp. There are many ways to obtain said fire resistance, but any means will work. (These days, getting anywhere near the endgame without a bucketload of resistances is merely ''mostly'' suicidal.) ²[[/folder]]²²[[folder:Survival Horror]]²* This happens all the time in various ''Franchise/ResidentEvil'' games (most notably in the earlier games), often with either a crank or valve handle.²* The service elevator in ''VideoGame/SilentHill2'''s hotel only allows one person to enter without baggage.²** You can't even take a few ''pieces of paper'' onto it with you.²* ''VideoGame/EternalDarkness'' occasionally puts force fields emblazoned with a rune in your way. Acquiring the rune pictured and approaching the barrier dissolves it. Most of the game's puzzles then become about finding the correct spell and the power level necessary to bypass or eliminate obstacles that are put in your path.²* ''VideoGame/SweetHome'' gives each member of your party a unique item that is used to solve the many puzzles in the game: Kazuo's lighter to burn certain objects, Asuka's vacuum to restore frescoes, Taguchi's camera to reveal hidden clues on said frescoes, Akiko's first aid kit to cure status ailments, and Emi's key to unlock doors. With FinalDeath in place in this game, the loss of even one party member can make some puzzles unsolvable, forcing you to either find an item that can replicate the dead party member's function (taking up your very limited inventory space in so doing) or find another way to proceed.²[[/folder]]²²[[folder:Western RPG]]²* Different obstacles in the Fade during ''VideoGame/DragonAgeOrigins'' each require different [[VoluntaryShapeshifting alternate forms]], which are obtained from lost souls somewhere in the dreamscape. The rat can go through rat holes, the spirit can go through portals, the golem can smash large doors, and the, er, burning corpse can walk through fire. ²* In ''Dungeons & Dragons: Warriors of the Eternal Sun'', your party is unable to explore a particularly volcano-y cave without every member wearing Rings of Fire Resistance. Aside from their obvious advantages involving the resistance of fire, these items are only really necessary for this part. Take a ring off and your character will slowly burn to death.²* ''VideoGame/LandsOfLore 2: Guardians of Destiny'' contains lots of areas that can only be accessed if the hero is in the form of a giant beast (allowing him to shove obstacles out of his way) or a tiny lizard (allowing him to slip through cracks). The hard part about this is that, for a good chunk of the game, you have ''absolutely no control'' over when he transforms or which form he changes into if and when he does.²* ''Franchise/TheElderScrolls'':²** Downplayed in ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'', where you must levitate to reach the upper levels of Telvanni mage towers. If you haven't bothered to train your Alteration skill, this can be a hindrance to advancing in many quests. Luckily, potions of levitation are found in abundance and several items enchanted with levitation spells are given to you through quests. (Including one given to you as part of the main quest ''right'' before you're required to enter Telvanni towers for the first time.) You can also brew your own potions or make your own enchanted items.²** To access the summit of the Throat of the World in ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'', you need to learn a specific Shout in order to part the blizzard that will otherwise rapidly drain your health. Said Shout is only learned as part of the main questline, barring you from the area until you make a certain amount of progress.²* To enter the ''VideoGame/FalloutNewVegas'' DLC ''Honest Hearts'', you need to be carrying an inventory load of 75 pounds or less, while it's 100 pounds if you have Speech and Barter skills of 50 or more or have the Strong Back perk. In ''Lonesome Road'', you need a Science skill of 75 to access the Hopeville silo mainframe and unlock the way forward.²** In both cases, any progress-blocking effect is dulled by the fact that skill magazines and chems are quite plentiful in game.²* ''VideoGame/MightAndMagic'' had, throughout the series, the need to learn a skill to be able to cross water (or, in some games, to cross water ''without taking damage'' -- not much of a problem with a stream, insurmountable for an island some distance from the coast). In I-V and X, this was specifically waterwalking, and in I-V you also had skills to cross forest and mountain regions. In VI-IX, the different map structure meant that ''flying'' worked equally as well as waterwalking (which meant that VIII had ''four'' separate abilities that all allowed it, thanks to keeping the spells while also having racial abilities that could be honed) -- generally, by the time you needed to cross water chances were you already knew a fitting spell.²[[/folder]]²²----

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