->''"I have noticed some consistencies with all the VideoGame/{{Half-Life}} games: you always have to go through incredible odds of alien monsters and potent deathtraps and evil soldiers and treacherous jumps and taxing challenges just to get to the other side of a locked wooden door."''
-->-- '''Thomas Savage''', in the notes for ''Webcomic/{{Concerned}} [[http://www.screencuisine.net/hlcomic/?date=2006-07-17 #172]]''

->''"Oh my god, this is ''where I just came from!'' Am I going in circles?"''
-->-- '''Gordon Freeman,''' ''Machinima/FreemansMind''

So, you've hacked and slashed your way through a dungeon and possibly passed a PointOfNoReturn or two. You have reached the final room and taken the MacGuffin, and are now ready to leave this place.

The only question is... how? There's no way the game designers will make you [[BackTracking backtrack through all the corridors you've cleansed all the way to the entrance]], right? And sometimes, it may even be impossible, as the original route has been blocked.

Luckily, there's a conveniently placed door, right there in the final room, just waiting for you to open it. [[CoolGate You go through it and, voila, you're at the entrance]], right where you started, saving you the trouble of returning here the long way.

More often than not, you may even recognize the door as a LockedDoor from before, which would be very convenient if you had a way to open it from the other side ''before'' you went the long route, saving you all the trouble. Of course, it's initially always {{i|nsurmountableWaistHighFence}}mpossible even with a {{BFG}} in your arsenal, but once you easily open the door from the other side, it will usually remain open, giving you quick access to the area that once used to be so hard to reach. If a bug allows you to open a DoorToBefore from the "wrong" side, it's a DungeonBypass and can lead to SequenceBreaking.

Particularly asinine game designers may even replace a locked door with an InsurmountableWaistHeightFence that's ''just'' too high to climb from one side, but once you reach its other side, there's something that allows you to climb and jump it and thus have a shortcut to a previously explored area.

Of course, search-and-rescue missions will ''never'' have such convenient shortcuts -- instead, the player will have to [[EscortMission bring the rescued prisoners all the way to the original entrance]]... and the corridors that you already fought your way through once will probably be repopulated with RespawningEnemies.

If you utillize your newfound MacGuffin to create a new exit, it counts as a {{Metroidvania}}.

These are a favorite of {{Speedrun}}ners, as it's quite common for games to have glitches that make it possible to open the one-way doors from the wrong way, skipping minutes to hours of gameplay.

----
!!Examples:

Note: non-VideoGame examples go at the end.

[[foldercontrol]]

[[folder: Video Games ]]

* ''VideoGame/{{ICO}}'' employs the DoorToBefore trope extensively. It starts out deep within a castle's catacombs, then works its way into an EscortMission that takes [[KidHero Ico]] and [[FallenPrincess Yorda]] through a game-long flight across a full-scale island fortress. They navigate [[BrokenBridge inconveniently gaping chasms]], [[DeathTrap death-rigged rooms]], [[BlockPuzzle puzzle-based chambers]] and basically tour the whole building - ramparts, gardens, cemeteries - to [[LockedDoor unlock the one escape door]]. When you finally open the doors, [[spoiler: [[SavethePrincess she gets kidnapped]]]], so you have to climb your way back to where you started out at the catacombs for [[FinalBoss one last fight]].
* In the old server complex in ''TheNamelessMod'', there is a door that is just out of reach. When you go through the entire level, it is the door that will take you back to the entrance.
* The original ''VideoGame/{{Half-Life|1}}'' is ridden with both "door" and "fence" varieties. Usually, once you get to the other side, you have to press a button or remove a bar to unlock it.
** ''VideoGame/{{Half-Life 2}}'' has at least a couple doors that are blocked because there's a couch or something keeping them from opening. When you get to the other side, you can gravity-punt it out of the way.
** The most blatant comes early in the original, where you fight many soldiers and go outside just because one security guard who could have opened a door didn't think to grab a shotgun while being attacked. Oh, and there is a scientist near this shotgun who could've helped, or at least pushed a button while his buddy scientist screamed at him to do it.
** This concept is referred to as a "loop" in game design, at least by Valve. This section of the Valve Developer Community (a wiki for using Source's Hammer level editor) explains the reasons for using them, and advantages/disadvantages of their use. [[http://developer.valvesoftware.com/wiki/Loops_%28level_design%29 Link.]]
* The training level in ''VideoGame/{{Nox}}''. The ogre village level is an odd example of a search-and-rescue mission that ''does'' have a DoorToBefore -- namely, the front gate that can only be opened from the inside.
* In ''VideoGame/ChronoTrigger'', when you finish most boss battles, there is an easy way back to the start of the dungeon.
* Numerous examples in ''{{Killer7}}''.
* ''VideoGame/MilonsSecretCastle'' has this in each of the accessible rooms from outside the castle. The only difference is that you actually have to find the door by blasting a bubble at its location, and then find its key.
* ''VideoGame/DragonQuestHeroesRocketSlime'' has one of these back to Boingburg every time you beat one of the major bosses.
* In ''BreathOfFireIII'' [[spoiler: After going across the ocean and stepping into a teleporter on the other half of the world, you wind up back at Steel Beach in the Freighter; the door was locked on the other side when you first entered when retrieving the parts to fix the boat.]]
* The entrance to the Vulkar base in ''VideoGame/KnightsOfTheOldRepublic'', requiring the player to seek an alternate way through the rakghoul-infested Undercity sewers.
** The exit from Ludo Kressh's tomb in the sequel, although it isn't visible from the other side.
* A good number of ''Zelda'' games have made use of this, which happens when Link grabs the Triforce piece, instrument, or whatever other quest item he beat the dungeon's boss to get.
** ''VideoGame/TheLegendOfZeldaALinkToThePast'' did not: Beating the boss transported you to the dungeon exit, but returning to the boss' room later ''can'' leave you stranded, forcing you to use the "teleport me back" magic item (or save and exit).
** ''VideoGame/TheLegendOfZeldaOcarinaOfTime'' and later games have Link entering a portal of light that opens up in the ground after beating a boss.
** ''Ocarina'' also gave you Farore's Wind, which was a sort of reversal of this, as casting it created a waypoint for whatever room of the dungeon you were in. Because saving and quitting returned you to the entrance, this was an easy way to pick up where you left off.
** Also, many of the boss chambers were accessed from a room fairly close to the entrance: much of the level revolved around acquiring either the key or the {{MacGuffin}} that allowed you access to the boss chamber.
** Starting with ''VideoGame/TheLegendOfZeldaTheWindWaker'', the series has included enormous dungeons with a number of teleport-out exits. But watch out, since those exits are one-way, that means another trek through dozens of rooms of freshly repopulated dungeon.
** It also applies to the overworld map in ''VideoGame/TheLegendOfZeldaTheMinishCap'': picking up certain items or approaching from the other side allows one to open up shortcuts that bypass challenging enemies and puzzles.
** In ''VideoGame/TheLegendOfZeldaTwilightPrincess'', you can locate a creepy birdlike creature called Ooccoo in most of the dungeons, and rescue her from the pot in which she's managed to trap herself. After that you carry her around like an item for the duration of your time in the dungeon, and can use her at any time to be immediately transported to the dungeon exit. This is in addition to Midna teleporting you out after you've defeated the dungeon boss.
** You can use Ooccoo's even creepier son to teleport back to the room you used Ooccoo in, which means that you don't have to traipse all the way back through the dungeon.
** And then there's the elevator down from Gor Coron's chamber. If you plan on going straight into the Mines and never returning to the chamber after you beat Fyrus, you'll never need it, but hey, there's the option.
** In ''VideoGame/ZeldaIITheAdventureOfLink'', the 6 palaces have a back door just past the statues you place the crystals in that takes you outside. [[FridgeLogic It makes one wonder why Link doesn't just use these doors to begin with and skip the whole dungeon...]]
** ''VideoGame/TheLegendOfZeldaSkywardSword'' has many of these.
* ''CityOfHeroes'' takes it a step further: If you successfully complete a mission, an "exit" button will appear in the compass window. Click it while anywhere in the mission interior and you somehow find yourself outside instantly, even if you were totally surrounded by hostiles a moment ago.
* Conversely, ''CityOfHeroes'' follows the search-and-rescue example in the trope definition to a T. You've just slogged through anywhere from two to five floors to rescue Dr. Helpless Scientist and then have to lead them all the way back the way you came to the front door, almost invariably fighting off waves of ambushes along the way. And forget about using stealth powers to avoid detection on the way out. Your rescuee can't see you either!
** The "stealth" portion has been fixed by an update. Rescuees can still see you when you're stealthed, but, because you're escorting someone, being stealthy is much more difficult, resulting in a massive penalty to your stealth ability. So if you invisibled yourself past all the mobs, get ready to fight them all on the way out.
** There's a good reason why players using the Mission Architect vastly prefer to use the old "release the captive and let them find their own way out" option instead of "escort back to the entrance".
* Used in 'The Great Cave Offensive' in ''VideoGame/KirbySuperStar'': In the beginning of the game you see tiles on the floor that are different than the floor; After making it through the labyrinth, collecting treasure and defeating bosses along the way, you find a bomb block that destroys the tiles leading you back to the surface where the game started with a Warp Star ready for you.
* The ''Franchise/ResidentEvil'' series just ''loves'' doors apparently only held shut by a simple latch on one side.
** ''VideoGame/ResidentEvil0'' makes more use of this trope than any of the rest in the franchise, partly because of a gameplay mechanic change: There's no Item Storage Box anymore, you just drop your weapons and items right on the ground to be picked up later. To make backtracking easier, you find ''tons'' of shortcuts to earlier parts of the game. Even near the very end, it's possible to go right to the beginning part of the mansion from a simple elevator.
** The novelizations subvert this trope, as the characters have no compunctions about blowing open a door with a shotgun, though it does take a few shells to do so. And in the remake of VideoGame/ResidentEvil for the Gamecube, Barry Burton does blast open a locked door during the (no-longer-dreadful) Jill Sandwich sequence, making it an example of CutscenePowerToTheMax, since you can ''never'' do that yourself.
* In ''VideoGame/PaperMarioTheThousandYearDoor'', the beating of a boss usually sends you outside automatically, but not so with the defeat of Cortez. However, the room before the ship then has a convenient way back to the shore of Keelhaul Key, if only you can get past that newly-cracked wall. Indeed, since [[spoiler:you have to go ''back'' to Cortez to ask for his help almost immediately]], it comes in handy twice over.
** Same for the first game, although convenient switches to other characters hide how exactly Mario got out, on his own or by help of the newly rescued Star Spirit.
** In addition, every tenth floor of The Pit of 100 Trials contains a Warp Pipe that takes Mario back to the top.
* Found in many dungeons and caves (especially quest-related ones and Ayleid Ruins) in ''VideoGame/TheElderScrollsIVOblivion''. Sometimes the door can be easily traversed from either side, but is hidden in such a way that you would have to be especially observant, or know exactly where to look, to bypass the level.
** A particularly extreme example is with the Mehrune's Razor DLC. After going through a load of ruins, caves and dungeons, fighting your way through a small army plus a few other foes, you finally reach Mehrune's Razor. After taking the weapon, a secret door will open and it leads right to the outside through a hidden underwater passage. It takes about 30 seconds to leave the dungeon but it takes about an hour to get there.
** It is ubiquitous in ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'' dungeons as well. Barred doors, stones that slide down upon some action, doors to outdoor (and therefore Fast Travel) overlooks...
** ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'' has very few dungeons ''designed'' like this (one of very few examples is Sotha Sil -- where you get a ring that allows you to teleport to and from Sotha Sil at the end -- and that's mainly because you are teleported in, so you couldn't leave by backtracking anyway). However, the presence of Mark/Recall (mark a location with Mark, then teleport to that location with Recall), Divine Intervention (teleport to the nearest Imperial Cult shrine) and Almsivi Intervention (teleport to the nearest Tribunal Temple temple) allows the player to quickly get out of a dungeon without having to backtrack, and some quests encourages this behaviour (hilariously, one of them is a search-and-rescue mission -- you get handed a couple of Divine Intervention scrolls, and are told to infiltrate a high-security Temple prison and break out a specific person. She uses one of the scrolls to get away, and says you should use the other, since not only will it get you out without having to go through the guards again, but the city you'll arrive in is the one you need to go to next anyway).
* One way Waystones at the ends of a few dungeons in ''VideoGame/FinalFantasyXII'', except without the easy return option: ''"By this, return ye to [wherever you came from]. By other means, return ye here."''
** Happened earlier in ''VideoGame/FinalFantasyVI''; after opening the Sealed Gate, hitting Kefka, releasing a few Espers, and watching it seal back up, a one-way Door to Before appears in the anteroom to take you back to the first room.
** Actually happened even earlier than that in ''VideoGame/FinalFantasyIII'' with the Teleport spell, that ''only works in dungeons''!!! Oh, except the final dungeon.
** Also done in ''VideoGame/FinalFantasyVIII'' during the Galbadia Missile Base mission. Bizarrely, the door only opens if you set the self-destruct timer to twenty minutes or less; otherwise you have to backtrack.
** In ''VideoGame/FinalFantasyX'', late into the game, you gain the ability to board the airship from any save point. It's not exactly a way back to the beginning of the dungeon (you have to travel back there if the airship doesn't drop you off right in front of it), but it's a nice escape if you need to restock on supplies.
** ''VideoGame/FinalFantasyXIII'': Taejin's Tower during Chapter 11 is a long, convoluted puzzle that involves rotating each floor to align with the elevator shaft, so as to continue your ascent. The dungeon itself is long, arduous, full of DemonicSpiders, has multiple side-quests within and ends with ThatOneBoss. Mercifully, the tower fully re-aligns itself so you can travel to any floor upon the boss' defeat.
*** Also, at the end of the VeryDefinitelyFinalDungeon, three warp gates are provided for you; one to the FinalBoss, one to the beginning of Eden (the previous chapter's DungeonTown) and one to the base camp on Pulse for some last-minute grinding.
* The ''Hordes of the Underdark'' expansion for ''NeverwinterNights'' features a dungeon that has a locked door at the entrance. Normally this is a door to before that opens from the other side once you complete the dungeon. However, if you have a character with enough points (a lot) in lockpicking it is possible to unlock the door from the entrance and skip straight to the end of the dungeon.
* ''NeverwinterNights2'' mostly averts this: after finishing your business in a zone, you're usually offered to be teleported out if it would take too long to return "manually". It's simply assumed that you walked back the same way you arrived, just off screen. The Temple of Seasons in Arvahn is one straight example with a DoorToBefore, and thanks to a bug, you can just pick it with the Open Lock skill and head from the entrance straight to the MacGuffin, [[DungeonBypass skipping the entire dungeon]].
* The Watcher's Keep in ''BaldursGate II: Throne Of Bhaal'' is a pretty straight playing of this trope.
* ''VideoGame/SkiesOfArcadia'' features plenty of this.
* The ruin stages of ''VideoGame/LostInBlue'' and its sequel both have this feature.
* ''VideoGame/{{La-Mulana}}'' had something like this in the [[BonusLevelOfHell Hell Temple]]: [[spoiler:Taking a ladder in one room will bring you back up to the first screen, with no direct means of return.]] However, the player ''hasn't'' reached the goal at this point, and if they use it, they'll have to go all the way back through the temple again. (The game really does not want you to get to the end.)
* The ''VideoGame/{{Metroid}}'' games thrive on this trope. In the ''Prime'' sub-series, especially, it's common for players to traverse the same area 4 or 5 different times, with new paths to/from it available to them each time.
** Example: In ''Super Metroid'', the escape sequence takes you behind Mother Brain's room and through the rest of Tourian as it's exploding, then give you a flat path to run down and inadvertently charge up your speed booster. Speed booster blocks allow you to charge through without knowing it--leading you right back to [[spoiler:the escape shaft from ''Metroid 1'', which you came back down through at the beginning of the game, allowing you to enter the former location of the Tourian base from the wrong side]].
** Another random example in ''[[MetroidPrime Echoes]]'' - After going up an elevator in the Ing Hive and transporting back to Sanctuary Fortress you go through this dynamo area, letting you save the game. You continue onward to the temple, then backtrack slightly and go a different way. Then you fight the Spider Guardian, and once you've beaten it, you find there is another exit at the top of the battle arena, which leads to a morph ball tube which suddenly ends and drops you - right back at the room just after that first elevator. You don't have to use the portals to get back, as you have the Spider Ball (the lack of which is what made you go into Dark Aether in the first place.)
* The ''Pokémon'' games have those ubiquitous ledges. You can hop down them, but not up, and they're often used as one-way shortcuts. Also, the one-way teleporter on the 7th gym in ''VideoGame/PokemonRubyAndSapphire/Emerald'', Tate and Liza's gym. After a rather annoying puzzle where you have to ride one-way floor panels and flip switches to get to the gym leaders, they leave you a teleporter pad that leads to the front. A similar thing happens in Sabrina's gym, but it is full of teleport pads - and the only different one in Sabrina's chamber leads back to the gym's entrance.
** Also, in ''[[VideoGame/PokemonGoldAndSilver Pokémon HeartGold and SoulSilver]]'', defeating or catching Mewtwo in Cerulean Cave reveals a ladder behind Mewtwo, which leads to an island on the first floor behind one of the aforementioned ledges, not too far from the entrance.
** In weirder example, one doorway in the deepest part of the Seafloor Cavern inexplicable takes you out to the entrance room out a door which the first one isn't connected to except when you're going that one way.
* The Deadmines in ''WorldOfWarcraft'' are a weird example. Even though you enter them through a house in the town of Moonbrook and keep going downwards all the way through, the one-way exit from the final cave takes you to a hill ''above'' Moonbrook.
** Several Instances in World of Warcraft (Well, most of the Burning Crusade instances) have shortcut exits after the final boss, sometimes leading to an exit portal (Botanica, Deadmines), others lead to shortcuts leading back to the entrance portals (Blood Furnace, Underbog)
** Now totally bypassed by the new Looking For Group functionality which will teleport you into an instance, and then return you when finished no matter where you are.
** A number of the newer dungeons, and being refitting in some of the larger old dungeons, have portals available so that if you get killed in one of the latter parts of the dungeon and have to reenter the main entrance, you can at least partly teleport past all the stuff you have already cleared.
* ''VideoGame/TalesOfSymphonia'' offers this option in the last dungeon, provided that you don't go straight for the last boss right away. Upon reaching the last area, a bit of hunting will provide you with a key item called the Sacred Stone that allows you to warp between the entrance of the last dungeon and the area right before the final boss. Also, there are a couple dungeons that you must pass through to get into some towns, like the Meltokio Sewers. To save players the frustration of having to traverse these dungeons each and every time you need to go into those towns, the game offers a "Quick Jump" option that lets you warp between the dungeon's entrance, and the town itself. Lloyd also [[BreakingTheFourthWall breaks the fourth wall at one point]] by asking why there isn't a Quick Jump option for a dungeon they had to go through a second time due to plot reasons.
* Moria Gallery in ''VideoGame/TalesOfPhantasia'' has a switch halfway through pulling which opens a staircase straight to the first level and another one at the end of the dungeon which goes straight to the previous, making a very convenient shortcut to the exit. Thankfully, both switches remain on for the whole 150 years, meaning [[BonusDungeon the newly discovered parts]] are accessible straight away.
* ''VideoGame/{{Portal}}'' sort of has this; shortly after Chell escapes being dropped into a horrible pit made of fire, she slides through a tube into a test chamber she had already completed somewhat early on in the game and must go through it again to move on -- solving it in a different, unintended way.
* ''{{VideoGame/Diablo}} 1'' has these for each of the 3 latter areas, the Catacombs, the Caves, and Hell. ''Diablo 2'' has the Waypoints which act just like this, but are explicitly magic, justifying the trope some.
* Many levels in the ''SpyroTheDragon'' trilogy are giant circles; there's always a wall you can now smash or an elevator that can only be activated from the far side of the level.
** Especially obvious in ''Year of the Dragon''; not implemented that much in the first two games.
** Insomniac Games seems to like this trope; pretty much every level in RatchetAndClank is designed similarly. If there isn't a door, there's a teleporter.
* There are many times in ''VideoGame/DeadSpace'' in which one appears. It's often due to [[BrokenBridge previously locked doors]] opening up, but the occasionally enemy breaking through the door occurs as well.
* The Nancy Drew mystery game ''Danger on Deception Island'' had one of these underneath the lighthouse. Of course, to open it, you had to make your way through a branching underground cave.
* ''VideoGame/CastlevaniaOrderOfEcclesia'' forces you to fight a giant crab to get to the other side of a lighthouse. No explanation why you can't just ''go around the lighthouse.''
** Well, there is some useful stuff in the lighthouse; and if you didn't go in there you wouldn't get to rid the world of another evil monster by [[BestBossEver means of a giant friggin' elevator]].
** ''[[VideoGame/CastlevaniaSymphonyOfTheNight Symphony of the Night]]'' has a memorable instance of this trope: after exploring a large portion of the castle, you now find yourself on the far side of a wall you passed very early in the game. There is a conveniently placed ''cannon'' that you can use to blast the wall down. There is no reason or use for the cannon other than blasting down this wall.
* In the PC game ''VideoGame/{{Darkstone}}'', when you complete any one of the four-level dungeons, you actually ''do'' have to make your way back through the entire thing to the exit. This is, however, made easier by using the game's list of places visited in the dungeon; you just click on "Level Exit" and your avatar will promptly run the shortest route through the level to the stairs leading up.
* ''VideoGame/UnchainedBlades'' has a ''lot'' of these throughout the Titans, with doors barred on one side. Often, once you've gotten through a floor once, these unlocked doors will allow you to get to the next floor almost instantaneously when traversing the Titan again (most egregiously on the first floor of Titan Slon, where the staircase to the second floor is literally two tiles away from the entrance, with the one tile between them being a door that was initially barred from the side near the staircase).
* ''VideoGame/Left4Dead'' has a Door To Before in No Mercy 3 after a crescendo for people that got yanked outside by a Smoker so that they can go through the door their team opened instead of going through the normal way all over again. The door was very glitchy and could be broken to bypass the event entirely. When the campaign got ported to Left 4 Dead 2, the door was even glitchier since any melee weapon could instantly break it. After several patches, the door no longer breaks, but Valve apparently forgot about players that use a GrenadeLauncher, thus the door can still be broken if you have that weapon.
* ''VampireTheMasqueradeBloodlines'' has a particularly irritating example: after slogging your way through [[ScrappyLevel the Los Angeles sewers]] in search of the Nosferatu warren, you find a tunnel in the back of the Nosferatu primogen's room leading straight out into the Los Angeles mausoleum.
* The [[VideoGame/MarioAndLuigi Mario & Luigi]] series just love putting several sets of iron bars, walls or any other kind of [[LockedDoor Locked Doors]] that can only be opened from behind all over every single dungeon in the three games of the series. They usually lead to a big room with a SavePoint or a health-recovering spot. This way, you don't have just a shorcut to the last room, but to basically any large area in the dungeon which is worth being searched for secrets.
* Averted in {{Albion}}. If you aren't teleported back to the entrance once you reach the end of the dungeon, you have to walk all the way back. Thankfully, this only happens in smaller dungeons.
* The ''Franchise/SilentHill'' games have these in spades. In ''{{S|ilentHill2}}H2''s hotel, to get behind the door to before, you have to first use a service elevator that requires you to leave all your items on the shelf, then to unlock it, you must use a lightbulb obtained from a tin can so you can see the lock.
** ''Silent Hill'' takes advantage of its violation of the rules of physics and reality to have some really unnerving instances of this trope. Another example from the second game is when [[spoiler: James descends an impossibly-long stairway to an underground prison, going down well over 500 feet(and then jumping down several very deep holes and taking an elevator), and once he reaches the prison's exit, the door opens to the lake outside the town, at ground level. ''No stairway similar to that leading in was ever ascended.'']]
** In the first game, there's a door on the second floor of Nowhere that leads back to the first floor, with no visible descent in between. This door is required after you shut off the power.
* ''VideoGame/{{Fallout 3}}'' has quite a lot of these, but the most jarring example is in the Broken Steel DLC where after going through the Satellite Relay Station, which is on a separate map west of the Capital Wasteland, you return to the latter through a door...up a friggin' mountain, at an incredibly small niche in the rocks that you cannot get back up to after jumping off it. Later, to reach Old Olney Powerworks, you have to go through a series of Deathclaw-infested utility tunnels followed by a ruined building, but the exit leads out of a previously locked manhole near where you started. The Powerworks itself has a backdoor to the Tesla Coil room that can be hacked if you've maxed out your Science skill.
** ''VideoGame/{{Fallout 3}}'' and ''New Vegas'' also allow you to "fast-travel" to any location, skipping traveling around the world - as long as you've been to said location at least once.
** The Presidential Metro in ''Broken Steel'' has a back door to the Capitol Building that can only be opened once you reactivate the power in the former, during the final story quest, "Who Dares, Wins". Useful if going back to restock gear, since the Air Force Base is on a separate map from the Wasteland, which means no quick-traveling from there.
** Other examples include the Dunwich Building, the National Guard Depot, the National Archives (if you pass Button Gwinett's Speech challenge), the Statesman Hotel, the Chryslus Building basement, and the Germantown Police Station in ''Fallout 3'', the Sea Cave in ''Point Lookout'', and the REPCONN Test Site in ''VideoGame/FalloutNewVegas''. In some (but not all) cases, the door can be opened by picking a lock or hacking a termnal, or an upper floor can be reached with precise jumping, [[SequenceBreaking allowing you to bypass the entire 'dungeon']]. Subverted by the Bomb Storage in Fort Constantine, where the outer doors can be picked, but the inner door is unpickable, and can only be unlocked with Tara's key, which to reach, you have to get Dukov's, Dave's, and Ted Strayer's special keys during "Shoot 'Em in the Head" to enter the bunker from the other side.
** Another example in ''Fallout New Vegas'' is vault 22. You have to go through four floors, unlock a door and wander through a cave to reach the computer terminal. At which point a NPC appears to fix the elevator so you can easily travel across all the floors. However if you have a high repair skill you can fix it yourself, happily take it down to the lowest level, then only go through 1 room and a corridor to get to the terminal.
*** ''Dead Money'' has many examples. The Puesta del Sol Service Route, once unlocked with the Foreman's Key, can be used as a shortcut when escorting Dean to Puesta del Sol South. Another shortcut back to Puesta del Sol North is through a ruined store reached by jumping down to a ledge from where you drop off Dean. After dropping off Christine at the Switching Station terminal, a nearby elevator leads straight back to ground level. In the Salida del Sol North area, one of Dean's secret stashes is found by jumping into a Cloud-filled courtyard whose only exit is a key-locked gate back to SDS South, which can also be a shortcut when returning to the main Villa from the belltower.
* When you need to get back to the surface of the asteroid in ''VideoGame/AlphaPrime'', you go through the mining station's living quarters, only to [[AirVentPassageway pop out of a vent]] back at the beginning of the game, and thus the surface of the asteroid.
* Just about every dungeon, even most of the sidequests, in ''VideoGame/DragonAgeOrigins'' has a convenient passage back to the start once you find the room with the big plot reveal/boss fight. And if it's not an actual passage, it's an "Are you ready to go back?" dialogue option with the freshly rescued NPC.
* While not usually seen 'before' due to the linear level design, many temple buildings in ''VideoGame/TitanQuest'' come with a backdoor or stairs that lead from the most guarded and sacred center straight to the outside.
* The ''VideoGame/{{Persona}}'' series:
** In ''VideoGame/{{Persona 4}}'', the savepoint prior to a dungeon boss doubles as a teleport back to the entrance. Conversely, any time you enter a dungeon, you have the option of starting from the first floor, or going straight to the last floor you reached.
** ''VideoGame/{{Persona 3}}'' has the warp points that let you teleport to any other one, including the one conveniently located at the entrance.
* The hidden tombs in ''VideoGame/AssassinsCreedII'' contain elaborate, time-consuming jumping puzzles. The final room of each tomb contains a convenient door leading directly outside.
** Although, in ''[[VideoGame/AssassinsCreedRevelations Revelations]]'' we never see any doors/passages inside the final chamber. This makes it unlear how Ezio manages to escape, having on at least one occasion destroyed the way in.
** These jumping puzzles are made slightly less annoying by Ezio opening a ''DoorToBefore'' at fairly regular intervals, in the form of causing ladders or bits of masonry to fall such that you can climb back up if you fall off.
* The Coastal Thailand levels in ''Franchise/TombRaider: Underworld'' feature this. You exit the final sub-ruin through an underwater tunnel with a pair of stone doors at the end - that comes out into the sea just a few metres from where you started the level set.
** The ''Franchise/TombRaider'' series in general is ''made'' of this trope. If some long and convoluted puzzle room doesn't finish by dropping you right back at the start of the level with MacGuffin safely in hand, usually from a ledge you didn't even notice the first time, then the level designers were asleep.
* ''VideoGame/{{Borderlands}}'' does this constantly with ledges that you can jump off of, but not climb up to. Finished all the quests in a dungeon? Just look for the 8 foot ledge you can drop from to be back at the starting point.
** [[VideoGame/{{Borderlands2}} The sequel]] adds one-way Fast Travel stations, often placed right before a boss, these let you skip the long dungeon run you just made to get at the boss and just teleport back to sanctuary, and pick up more quests.
* In a stroke of mercy (instead of annoyance), ''DemonsSouls'' is designed with shortcuts you can activate at various points through the level so you can return to your corpse after your recent and inevitable death. Its SpiritualSuccessor ''VideoGame/DarkSouls'' continues this practice.
* ''AsheronsCall'' always has portals to the surface at the bottom of a dungeon.
* In ''RedDeadRedemption'', John initally travels to Mexico on a smuggler's raft down the Rio Grande, while taking fire from enemies on the riverbank, in an event that takes several minutes to get through. When he gets to Mexico, he can travel back to the U.S. by going over an enemy-free bridge, or fast-traveling instantly.
* In Pool of Radiance: Ruins of Myth Drannor there is an interesting example: Early on, when you visit the elve's hideaway, there is a tunnel in the cliff-side, however when you first investigate it its completely walled off. Later, as you progress through the ruined city you find passages that lead to the surface, all out through that tunnel, which is an incredibly useful tool compared to traversing the immense dungeon in order to leave and sell your junk. Oddly, the tunnel is on the opposite side of the surface map from the dungeon entrance, and many of the passage ways are on the far end of the dungeon (So it becomes something like so: Surface Passageway -> Entrance -> Inside Passageway). The passageways, are however two-way, so once you find them, you rarely have to go back to the main door unless you have to explore more of the main halls on that side.
* ''VideoGame/{{Alundra 2}}'' does this a couple of times: In the first room of the Ox Tank dungeon, there's a conspicuous locked door that turns out to lead to the boss room, and the Demon Whale spits you back out once you complete the dungeon inside of it. In addition, each of the three ancient ruins dungeons contain warp pads to the other two.
* The ''VideoGame/EtrianOdyssey'' series has made it a staple to include hidden shortcuts in dungeons that can't be entered when you first come across them, but, when after a lot of exploration you look at your map and see you ended up on the other side of the wall, you can "break open" the shortcut, not only offering a much faster way back but more importantly giving a much quicker way forward the next time you enter the dungeon. These conditional 2-way shortcuts were fairly uncommon in the first game, but by the third game, having a shortcut between the entrance and exit of a dungeon floor is almost guaranteed and most floors have 3 or 4 other shortcuts. The first ''VideoGame/EtrianOdyssey'' game also has a shortcut right before the [[BonusBoss final]] final boss all the way back to the entrance of the dungeon, giving the player a chance to save the game before plunging in.
* In ''SoldierOfFortune II'', you take a long circuitous path through the Prague Hotel, itself containing several useless doors to before, to reach Dr. Ivanovich, then it's just a short run to the back door from there, which dumps you in an area you traversed in the first level.
* The ''VideoGame/{{Marathon}}'' series often uses these, sometimes they're useless (Arrival), other times they're required to exit the level (Two Times Two Equals, Ingue Ferroque, All Roads Lead to Sol), or are a convenient shortcut back to the main area after new passages have opened (No Artificial Colors, Where Some Rarely Go). In some cases (Cool Fusion), you really do have to [[NoSidepathsNoExplorationNoFreedom backtrack the long way]].
* In both ''VideoGame/{{Ys}} I'' and ''IV'', Adol finds himself LockedInARoom at some point, then Dogi the Wallcrusher smashes a hole in the wall leading back to the beginning of the dungeon. Some of the games give you a [[WarpWhistle warp item]] to quick travel to previous areas, which may stop working after the PointOfNoReturn.
* All 4 campaigns in ''GuildWars'' end with the character winning the final mission, going to a "victory celebration area", than leaving that area to an earlier outpost. The most fitting example is probably the Nightfall campaign, where the last few missions involve the character getting taken to a realm in another dimension, fighting through several missions to finally kill the BigBad, than leaving through a portal to the big city on the starter island.
* The levels in ''VideoGame/GodOfWar'' do this a lot. Kratos will often run by a door that is locked, and then much later, no matter how far out Kratos has traveled, you will end up walking through that door. One example in the first game is when you walk by a gravedigger in Athens digging a grave. Much later you climb out of Hades on a rope, and find the rope leads up to that same grave.
* When a destroyed Generator in ''VideoGame/HeroCore'' lowers a nearby Barrier, it will occasionally create a shortcut to a previous room.
* In ''VideoGame/MySimsAgents'' (Wii), there are two cabins in the Mid-Mountain Slopes area. The first one you'll see is locked. The one you can enter from the outside can only be accessed once you provide Rosalyn with documentation that convinces her to let you use the key to the gate. This, in turn, requires you to boost the satellite's signal. Once in ''that'' cabin, you have to go through a maze of a mine, which ends... in the first cabin you saw, where [[spoiler:a bit of evidence]] is. Now you can unlock the door.
* In ''VideoGame/ThreeDDotGameHeroes'', each of the six dungeons has a portal right before the BossRoom that will take you back to the entrance when activated. The final dungeon (a combination of MarathonLevel and BossRush), has one on each floor.
* In ''VideoGame/TonyHawksUnderground2'', there is a door to before at the end of Downhill Jam. In the original version of the level in ''VideoGame/TonyHawksProSkater'', it instead leads to you ending the level early. The same is true of The Mall in ''VideoGame/TonyHawksAmericanWasteland'', where jumping through the boxes takes you back to the start of the level, not ending it like in the original ''VideoGame/TonyHawksProSkater''. The reason is that both these levels were originally designed as racing levels with a definite beginning and end, and the ends were left in as the programmers forgot to take them out.
* Often in ''VideoGame/{{Antichamber}}'', but the numbered rooms in the tower sections are the most obvious.
* In the ''VideoGame/DeusEx'' trilogy you can usually destroy, lockpick and/or hack a door but if you don't have the firepower, resources, skills or it's simply inadvisable to do, there's usually a secondary path to the objective and when you backtrack to the door it is commonly unlocked from the other side.
* Many dungeons in ''VideoGame/TorchlightII'' offer a red 'Portal to Surface' at their end, which will take players straight back to the dungeon entrance at the surface. This saves players the hassle of wandering back through the (usually still-depopulated) dungeon levels. As many optional dungeons have quest-givers immediately outside, this also simplifies completion of sidequests.

[[/folder]]

[[folder: Film ]]

* In an example that either inspired or was inspired by this trope, Conan and [[FiveManBand his party]] end up right where they started in ''Film/ConanTheDestroyer'' by smashing through a wall.
* Used well in ''NationalTreasure'' - [[spoiler: when the BigBad leaves the heroes stranded in an underground mine shaft while he tracks down the next clue. Ben notes that the first thing the builders would have done after completing the first shaft would have been to cut a secondary shaft to promote air flow and decrease the danger of cave-ins. They quickly located the second and unguarded exit... which happens to be in the hidden Treasure Room]].
* In ''The Book of Secrets'' - [[spoiler: After barely surviving the booby-trapped and decaying corridors leading to the treasure, complete with three complicated counterweight devices, the group leaves by a corridor that's only a few yards from the surface. The explanation here is that the corridor allows the temple to be flooded and drained at will]].

[[/folder]]

[[folder: Literature ]]

* There's an example of this in the WIP ''WebComic/GenderSwapped'' novella in Chapter 3. Jess notices Tess leaning against a door which was noted didn't have a doorknob. Later, after a couple hours, an elevator ride, a Monty Python skit, and several other random events that take place behind the scenes of the hotel. The two eventually end up on the other side of the door.

[[/folder]]

[[folder: Live Action TV ]]

* ''Series/{{Lost}}'' had something similar in season one. The Losties spent about half a season trying to get into the hatch, then when they finally get it open, they have to abseil down as the ladder is broken. Once inside, it turns out there's a door leading outside.
** The creators confirmed that this was actually a mistake, as they ''should'' have been able to get in through that door.
** How is that a mistake? No one on the outside knew about front door. Also, they couldn't have gotten in, it also was locked. (Although Desmond would have been more likely to open the door if someone was pounding on it.)

[[/folder]]

[[folder: Pinball ]]

* In Creator/WilliamsElectronics' ''Pinball/{{Defender}}'' pinball, opening the Stargate enables a gate in the right outlane that returns drained balls to the plunger.

[[/folder]]

[[folder: Tabletop RPG ]]

* ''TabletopGame/DungeonsAndDragons''. At the end of [=EX=]2 ''Dungeonland'', a door in the Mad Feast Hall (the last encounter) takes the {{PC}}s back to the Magic Mirror house where they first entered the adventure.

[[/folder]]

[[folder: Western Animation ]]

* ''TheSimpsons'' plays this for laughs when Mr. Burns decides to shut off power to Springfield. With Mr. Smithers, they enter a passage behind a bookcase through Burns' office, slide down firepoles, gain access to a vault via retinal scanner, and reach the main power room...where they then shoo off a dog who got in through the room's broken screen door.

[[/folder]]

[[folder: Real Life ]]

* Most movie theaters are designed like this, with a long, convoluted pathway that leads past the box office, a concession stand or two, and the ticket taker before reaching your theater. The way out, on the other hand, is often a one-way door that takes you directly out to the main lobby or even the parking lot.
** The same for emergency exit doors, at least to a lesser extent.
** Seattle's Children's Hospital, and probably others, has "staff only" corridors that can only be accessed from the outside with a security badge (unless it's an emergency); for others to access the area, they must take an elevator from a different floor, but the door can be opened normally from the inside.
** Concert venues are similar and for the same basic reason; they need to check tickets on the way in (so need to filter people), but not on the way out (so they just want everyone to leave as quickly as possible so they can clean up).
* The Winchester Mystery House in San Jose, CA has several rooms with one-way doors, forcing you to take the long way around to get back out. Justified, given that the house was built according to a conflicting mishmash of directions received through seances by Sarah Winchester.
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