A feature created to improve the replayability of some games. Some games are designed so you can reach HundredPercentCompletion in one go, but some others don't make everything the game has to offer available until you've beaten the game (that is, seen the credits) at least once. This is very common in RolePlayingGames and games with levels, but it can appear in every genre.

The exact things you can unlock vary from game to game. Common unlockables include a SecretCharacter, [[HarderThanHard higher difficulty levels]], [[AndYourRewardIsClothes a new costume]], the TrueFinalBoss, and many more. Sometimes the game makes the content unlockable by [[EndgamePlus doing a rewind to the last]] SavePoint before fighting the FinalBoss, but it's quite more common that the unlockables appear only in NewGamePlus, which is PostEndGameContent on its own right too.

A subtrope of UnlockableContent and supertrope to NewGamePlus, EndgamePlus and PlayableEpilogue. It will frequenly overlap with the other subtropes, DoubleUnlock being the most frustrating and most common one. Necessary for HundredPercentCompletion. Compare with DownloadableContent. Compare also with ExtendedGameplay.

----
!! Examples:

* To unlock the hidden BossRush level of ''AceCombatZero'', you have to complete the game trice.
* In ''VideoGame/AssassinsCreedIII'', after completing the game and watching the credits, a cutscene and two epilogue missions are unlocked, followed by [[spoiler:someone hacking the Animus and opening up the ability to unlock cheat codes and find a bonus Abstergo video]].
* In ''VideoGame/BatmanArkhamCity'':
** The ability to use alternate Batsuit skins for freeroam is unlocked after beating the story once (although it is also possible if one inputs a cheat code at the main menu screen before beating the game).
** The final chapter of Catwoman's storyline is only available after the ending cutscene and credits. When that mission is finished, the player can switch between her and Batman at any time, as well as finish another Catwoman-only mission where she can retrieve the rest of her diamonds.
** The in-game enemy chatter and menu description changes to reflect the fact that you've beaten the game.
* After defeating the final boss of ''VideoGame/BreathOfFireIV'', a new shop is opened by [[VideoGame/BreathOfFireIII two characters from the third game]], selling various powerful items.
* Some achievements in ''[[VideoGame/BrutalLegend Brütal Legend]]'' are only obtainable after beating the main campaign.
* ''Franchise/{{Castlevania}}'' series:
** The [[GameBreaker Duplicator item]] and several cheats for a new save become available in ''VideoGame/CastlevaniaSymphonyOfTheNight'' if you have a Clear or Replay save. If you get a high enough percentage you can unlock the option to play as [[SecretCharacter Richter and Maria]].
** The [[AnotherSideAnotherStory Sisters]] and [[SecretCharacter Richter]] modes unlock in ''VideoGame/CastlevaniaPortraitOfRuin'' [[MultipleEndings depending on the ending you get]]. [[GuideDangIt If you]] [[spoiler:kill 1,000 Old Axe Armors, you can also play as one]].
** ''[[VideoGame/CastlevaniaChroniclesOfSorrow Aria and Dawn of Sorrow]]'' unlock Boss Rush mode, as well as Julius mode (which, in Dawn of Sorrow, becomes [[spoiler:[[AnotherSideAnotherStory how the game continues after the Dark Lord ending]]]]).
** ''VideoGame/CastlevaniaOrderOfEcclesia'' unlocks NewGamePlus, Hard Mode, [[spoiler:[[SecretCharacter Albus Mode]]]], Boss Rush, and Sound Mode. If you beat the game at [[HarderThanHard Level 1 Hard Mode]], you'll unlock [[BraggingRightsReward level 255 mode]].
* ''VideoGame/ChronoTrigger'' has NewGamePlus, where you can find [[MultipleEndings many more endings]] that you couldn't access before unless you [[LevelGrind level grinded]] ''a lot''. The [[UpdatedRerelease DS version]] exclusive Dimensional Vortex, however, only unlocks in NewGamePlus.
* In the ''VideoGame/DevilMayCry'' series, [[HarderThanHard Dante Must Die and the upper difficulties]]. They later unlock [[AndYourRewardIsClothes the Super Costumes]] (not [[BraggingRightsReward that you need them anymore]]).
* The ''Franchise/{{Disgaea}}'' series. Many {{Bonus Boss}}es and [[BonusDungeon Dungeons]] only become available after killing the final boss, as well as some {{Secret Character}}s. Some of the [[VideoGameRemake remakes]] feature [[GaidenGame gaiden]] [[AnotherSideAnotherStory storylines]] that are only unlocked after completing the game, as well.
* [[AnotherSideAnotherStory Inward]] [[BrutalBonusLevel Chaos]] and {{Secret Character}}s [[VideoGame/FinalFantasyXII Gabranth]] and [[VideoGame/FinalFantasyXI Shantotto]] in ''VideoGame/DissidiaFinalFantasy''.
** More costumes, [[AnotherSideAnotherStory Confessions of the Creator]] and more {{Secret Character}}s in Duodecim.
* It's been suggested (not inaccurately) that ''VideoGame/DragonQuestIX'' has more post-game content than game content.
* Endless Mode in ''VideoGame/DuelSaviorDestiny'' doesn't unlock until you've beaten the final route. For every level you clear, you get points to spend. With these points you can unlock more characters to use and the ability to bring in allies. You can't buy certain stuff until you've progressed to a certain point, though, and certain levels have special bonus content.
* The SNES port of ''Faceball 2000'': after beating the main campaign mode, Cyberzone, you're given a code that unlocks a second, full-length campaign, Cyberscape, which contains all the levels from [[EmbeddedPrecursor the original Game Boy version]] of ''Faceball 2000'' just released a year earlier and [[UnexpectedGameplayChange plays differently from Cyberzone]].
* ''VideoGame/{{Fallout 2}}'' offers you legitimate cheats that increase all your skills to 300 and give free experience. One is a book given by a priest in New Reno; the other is a download in Vault City's computer. Both are avaiable after you beat the main quest.
* In ''VideoGame/GrandTheftAutoV'':
** After completing the main campaign, the surviving characters will receive certain text messages and phone calls based on the chosen ending.
** If Trevor survived the main campaign, a bonus mission, "Mrs. Phillips", will unlock after beating the main campaign.
* The ''HarvestMoon'' and ''RuneFactory'' series have special crops you can only purchase once you have reached the end credits. Both game franchises allow you to continue playing, even though the main plot has finished.
* As part of its EndgamePlus, ''Videogame/IMissTheSunrise'' gives you access to [[BonusDungeon Splice i]] and three new [[BonusBoss bounty hunts]].
* In the ''JakAndDaxter'' series:
** ''JakIIRenegade'' offers more mini missions for you to complete, and you also can unlock cheats and Hero Mode with the Precursor Orbs.
** ''Jak3Wastelander'' unlocks more or less the same as 2, but it let's you choose what you want to buy instead of requiring to reach an specific amount of orbs.
* The ''MegamanBattleNetwork'' series all have a fairly extensive post-game. It basically exists to allow the fairly complex combat system to be fully utilized, as the main game can be completed without too much effort, but the post-game requires you to really understand what you are doing.
* ''Franchise/MetalGear'' series:
** In the re-released versions of ''VideoGame/MetalGear'' and ''VideoGame/MetalGear2SolidSnake'', you can get the bandana for infinite ammo only after beating the game.
** In ''VideoGame/MetalGearSolid'', depending on which of the MultipleEndings you get, you win either the Stealth camoflauge or the infinite ammo bandanna. Beat the game twice on the same save and Snake will [[Film/JamesBond wear a tux]] and the Ninja will look like SpiderMan.
** ''VideoGame/MetalGearSolid2'' awards cool sunglasses to whoever beats the game twice on the same save. There are also various post-game rewards that you can take into a NewGamePlus by collecting dog tags.
** ''VideoGame/MetalGearSolid3'' awards [[InfinityMinusOneSword The Patriot]] and a Tuxedo to whoever can beat the game, and depending on your choices in a certain end game cutscene, you can get Ocelot's Revolver. [[NewGamePlus You also carry over all your special camos from beating the Cobras with stamina kills]].
** ''VideoGame/MetalGearSolid4'' basically has all of the above. Tuxedo? Check. Bandanna? Check. Stealth camo? Check. Special guns? Check. New special guns? Check. Of course, you have to either buy them or do some seriously NintendoHard tasks to win it all. You also carry over all of your boss-specific weapons, including the [[InfinityMinusOneSword Rail Gun]] which destroys vehicles, and [[NewGamePlus you carry over all your old guns, ammo and silencer stats]].
*** However, you only get said items after meeting up with Otacon and [[RobotBuddy the Metal Gear Mk II]], forcing you to play the first few maps without them.
** In ''[[VideoGame/MetalGearSolidVThePhantomPain Metal Gear Solid: Ground Zeroes]]'', unlockable weapons will spawn at your location upon replaying each mission, as well as unlocking Hard Mode.
* After the FinalBoss is defeated in ''Videogame/NiNoKuni Wrath of the White Witch'', the player is allowed to return to a point in time just before the fight, but with new side quests unlocked at Swift Solutions, a new string of {{Bonus Boss}}es available to fight, and the ability to claim some rare and powerful familiars from Umbopa.
* The "All Runes Game" and the Challenge Mode of ''VideoGame/OrderOfTwilight'', which are unlocked after completing the main game once.
* The ''{{Pokemon}}'' series:
** [[VideoGame/PokemonRedAndBlue The first generation]] unlocked the Cerulean Cave, home to the most powerful Pokémon Mewtwo. The remakes also unlocked the Sevii Islands.
** [[VideoGame/PokemonGoldAndSilver The second generation]] unlocked the Kanto region, with the gym leaders of the first generation ready to fight you again. Many people, however, consider this to be part of the game, and not an unlockable. Mt. Silver, on the other hand, only unlocks when you beat the 8 old gym leaders and lets you fight the TrueFinalBoss, [[spoiler: the protagonist of the first generation]].
** [[VideoGame/PokemonRubyAndSapphire The third generation]] unlocks the roaming Pokémon Latios or Latias. Ruby & Sapphire unlock Rayquaza and the Battle Tower, Emerald unlocks the Pokémon Frontier.
** [[VideoGame/PokemonDiamondAndPearl The fourth generation]] unlocks the upper right part of the map, with the Fight, Survival and Resort Areas, but to unlock the latter two you need to have seen every Pokémon in the Regional Pokédex (which can be a pain in the ass and a GuideDangIt to boot). Turnback Cave also appeared when you unlocked the previous areas. Pokémon swarms started to appear every day too.
** [[VideoGame/PokemonBlackAndWhite The fifth generation]] went one step further than any other, as beating the game lets you [[spoiler:fight the Champion of the League]], something never done before. Other important fights with {{Bonus Boss}}es are unlocked too, as well as new areas (the right part of the map) where old generation Pokemon appear. The option to connect with the fourth generation becomes available too.
** [[VideoGame/PokemonXAndY The sixth generation]] gears the post-end game content towards TournamentPlay, with the Friend Safari (where pokémon with two out of six perfect stats and better abilities can be caught) being unlocked, along with the Battle Maison awarding new prizes essential to stat breeding. Mewtwo also makes a comeback, holding his ([[Anime/PokemonGenesectAndTheLegendAwakened or her]]) Mega Stone.
** ''[[VideoGame/PokemonMysteryDungeon The Mystery Dungeon series]]'' are far from over when you end the game. You'll gain access to many new areas and a second storyline. You'll also be able to fight the boss Legendary Pokémon from the first part.
* The ''ProfessorLayton'' series offers you the Sound Mode, images, the cinematics and descriptions of every character... that is, if you obtained enough picarats from solving puzzles.
* The ''SilentHill'' series:
** ''SilentHill1'': If you beat the game once you'll access the chainsaw. Do it twice with a good and bad ending and you get access to a Katana.
** ''SilentHill3'': Beating the game gives you access to the HEZZAH BEAM!
** ''VideoGame/SilentHillOrigins'': Doing certain things in game will get you post-game rewards that include a plasma rifle, some GameBreaker gauntlets, and some [[AndYourRewardIsClothes sweet threads.]]
* The bonus worlds in the ''VideoGame/{{Something}} Series''. Something even advises you to complete the game before taking on the bonus world when you press the Switch Palace in World 4.
* ''[[StarOceanTillTheEndOfTime Star Ocean: Till the End of Time]]'': Completing the main quest will unlock the Maze of Tribulations, the Urssa Cave Temple, and allows you to take on the rest of Sphere 211 (which covers the remaining 111 floors). Each dungeon comes complete with their own bonus boss battles. However, [[ValkyrieProfile Lenneth and Freya]] cameo as the game's two [[SNKBoss optional bosses]], and have attacks so devastating, they can [[CurbstompBattle annihilate]] even fully leveled parties in record time.
* ''Franchise/SuperMarioBros'':
** Completing ''VideoGame/SuperMarioGalaxy2'' with 120 stars unlocks the green star challenge, an additional 120 stars. These range from pathetically easy, to RageQuit inducing difficulty depending on their location and means required to snag 'em. There's more. If you can get 240 stars (a feat in itself) and deposit 9,999 starbits in the toad bank, you'll unlock the HarderThanHard Grand Master Galaxy. This level comes with its own comet coin which must be collected along with the course's star. Then you get to take on [[ThatOneLevel "The Perfect Run".]] Good luck with that.
** Beating ''VideoGame/SuperMario3DWorld'' unlocks a number of secret worlds, the first of which also contains [[SecretCharacter Rosalina]], as well as the ''[[VideoGame/MarioBros Luigi Bros.]]'' minigame (though it can be unlocked at the start with ''VideoGame/NewSuperLuigiU'' [[OldSaveBonus save data]]).
* Tons and tons of characters in the {{Tekken}} series, as well as Tekken Bowl, Force, and Ball in ''3''.
* ''VideoGame/TheWorldEndsWithYou'' has a "Chapter Select" feature (including a bonus chapter, "[[AnotherSideAnotherStory Another Day]]"), optional sidequests for every chapter, [[HarderThanHard Ultimate difficulty]], and most of the [[InfinityPlusOneSword strongest]] pins, [[AndYourRewardIsClothes equipment]] and key items.
* In ''VideoGame/PlantsVsZombiesPinball'', beating Dr. Zomboss resets the game status, but all the zombies become slightly harder to kill.
* Creator/WilliamsElectronics' ''Pinball/SafeCracker'' pinball rewards players who beat the game with a (physical) "Magic Token". Players can use the token to play "Assault On the Vault", where they have 90 seconds and four balls to hit as many drop targets and ramp shots as possible.
* ''VideoGame/TheElderScrollsIIIMorrowind'' has a number of faction quests that require completing the main quest of the game first. There is an implicit gameplay consideration in this, since the common element between the quests is that they require you to kill people deemed Essential to the main quest (there ''were'' plans for a quest that instead relied on story considerations ([[spoiler:using your fame and power as the Nerevarine to get a master wizard to pay his taxes]]), but it got [[DummiedOut dropped]]). There are also a scattered few quests where having completed the main quest opens up new and usually easier options to completing them.
* ''VideoGame/MightAndMagic X'' gives you access to the joke Limbo Dungeon (it is a science-fiction-y dungeon version of the developer's office, and you get an achievement called "Beyond the Scenes" for beating it) after you beat the game. There is also a a relic (the game's version of artefacts. Worn/used ones level up as you get XP) you can only get after beating the game, though that's the result of it being the reward for a collection sidequest where one of the things you need to collect is in the final dungeon, and you [[PointOfNoReturn can't leave said dungeon until you beat the game]].
----