The party wakes up in the morning, only to realize that the hero has slipped away in the night and is gone. "Oh damn, he went alone" ensues, as it's obvious the hero went on a dangerous solitary errand - or worse yet, went to fight the BigBad [[ThisIsSomethingHesGotToDoHimself alone]].

This trope covers all kinds of important sneaky departures on behalf of major characters.

It's an unplanned (or is it?) one-man variant of LetsSplitUpGang. The hero might just [[IWorkAlone value their freedom]], despite being a good team player so far. Maybe ThisIsSomethingHesGotToDoHimself, or just wants [[ItsNotYouItsMyEnemies not to endanger the party]], or not to be [[OvershadowedByAwesome hindered by them]]. Additional points for a HeroicSacrifice, where he did it to win the MoreHeroThanThou argument in advance, not so many if we have a FaceHeelTurn, but even more points for proving to be a FakeDefector. After all, sometimes InTheEndYouAreOnYourOwn. Often indicates an upcoming DuelBoss.

On the practical side, the hero might sometimes make a SleepingDummy to distract the team, or resort to PercussivePrevention if someone insists on tagging along.

In [=RPGs=] this might lead into a "follow the splitter" episode, or a SoloSequence where the player gets to control the splitter. If the splitter is a GuestStarPartyMember, they might just [[SoLongAndThanksForAllTheGear leave with very valuable equipment]] on them.

Contrast NeverSplitTheParty. Not to be confused with StealthHiBye.
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!!Examples

[[AC:{{Comics}}]]
* ''{{Tintin}}'' comic "Explorers on the Moon" has Frank Wolff sneak out and [[spoiler:[[HeroicSacrifice sacrifice himself]] to save oxygen for the rest of the team]], cutting the wires around the door to make sure no alarm sounds.

[[AC:{{Film}}]]
* ''Film/ClashOfTheTitans'' (1981). While on the journey to Medusa's island, Perseus and his soldiers take off in the middle of the night, leaving Andromeda behind (and Ammon to look after her). Perseus doesn't want Andromeda to be present when the big fight with Medusa occurs because of the danger to her.

[[AC:{{Literature}}]]
* ''Literature/TheFellowshipOfTheRing''. Frodo splits, though is soon followed (and joined) by Sam.
* In ''Azure Bonds'', a ForgottenRealms classic, Alias runs on her own into the besieged Yulash [[spoiler:and ends up freeing Moander]]. Later, Akabar leaves Olive's company in a similar fashion, invisible.
* ''Literature/TheBelgariad''. At one point, some of the heroes sneak out early in the morning and leave a note. Most of those they left behind are not impressed.
* ''TheLionTheWitchAndTheWardrobe'' has Edmund, who sneaks away from the beavers' house to join the White Witch.
* Happens quite often in ''Literature/WarriorCats''.
** In ''Into the Wild'', Yellowfang sneaks away from [=ThunderClan=] camp to chase after Clawface, who she deduces has stolen [=ThunderClan=] kits. Firepaw, Ravenpaw, and Graypaw sneak away to chase after her, and so that Firepaw can fake Ravenpaw's death.
** In ''Fire and Ice'', Tigerclaw claims to have found evidence of an invasion that the Clan leader Bluestar needs to see. (It's actually a trap he set to kill Bluestar so that he can take over.) However, Bluestar is too sick to go and see, so Fireheart's apprentice Cinderpaw offers to go instead. Fireheart forbids her from going, but she sneaks out of camp anyway and walks into Tigerclaw's trap, causing her to get hit by a car and break her leg.
** In ''Fire and Ice'' and ''Forest of Secrets'', Graystripe constantly sneaks out of [=ThunderClan=] camp so that he can meet with his love interest Silverstream. This is necessary, as they are in a forbidden relationship.
** At the beginning of ''Forest of Secrets'', Fireheart and Graystripe sneak away after a Gathering to meet with Ravenpaw so that they can find proof that Tigerclaw murdered Redtail. They later sneak away from [=ThunderClan=] territory into [=RiverClan=] to find more proof, and eventually to deliver food to the starving Clan.
** In ''Rising Storm'', Cloudpaw sneaks away from [=ThunderClan=] to get food from humans. Unfortunately for him, this leads to him getting kidnapped.
** In ''A Dangerous Path'', after Bluestar refuses to make them warriors, Swiftpaw and Brightpaw sneak away from the camp to fight the dogs and prove their valour. [[spoiler:Swiftpaw ends up dying in the fight and Brightpaw gets half of her face ripped off.]]
** In ''The Darkest Hour'', it's revealed that Darkstripe has been sneaking away from [=ThunderClan=] camp to meet with Tigerstar and give him intel on what [=ThunderClan=] is up to.
** ''The New Prophecy'' begins with a cat from each Clan getting an omen telling them that they need to go on a journey far away from the Clans. Since they can't let their Clanmates in on this, they have to sneak away from the Clans and meet up together for the journey.
** In ''Twilight'', Leafpool and Crowfeather sneak away from their Clans to meet up, and eventually run away with each other. Since they didn't tell anyone, their Clans each think that they went to the other Clan.
** ''Dark River'' is basically sneaky departures, the book. First, Lionpaw and Heatherpaw are constantly sneaking away at night to meet each other. Then, Hollypaw sneaks away from [=ThunderClan=] camp and goes to [=RiverClan=] to find out what the huge problem impacting them is. Then, a battle starts when three [=WindClan=] kits sneak away from their Clan to explore the tunnels they heard about and [=WindClan=] thinks they were kidnapped. In order to stop the battle, two separate groups composed on Lionpaw, Hollypaw, and Jaypaw, and Breezepaw and Heatherpaw sneak away to find the kits.
** The plot of ''[[Literature/WarriorCatsDawnOfTheClans Dawn of the Clans]]'' is kicked off when Jagged Peak sneaks away from the tribe to join the Followers of the Sun Trail and find a new home, forcing Gray Wing to head after him so that he can keep him safe on the journey.

[[AC:LiveActionTV]]
* In ''Series/AgentsOfSHIELD'' Season 2, Episode 5, Raina meets with Coulson and tries to blackmail him into sending Skye to a certain address, [[spoiler:where Skye's father is waiting.]] Coulson had already planned for it, and neutralizes her threat against him, but Skye sneaks away anyway and goes to the address Raina gaves.

[[AC:{{Videogames}}]]
* ''Franchise/FinalFantasy''
** ''VideoGame/FinalFantasyVII''
*** Aeris leaves the party [[spoiler:and get killed by Sephiroth]].
*** Cloud attempts it early in the game, but Aerith [[TookAShortcut meets him at the entrance to the next Sector]].
** Adelle does this late in ''VideoGame/FinalFantasyTacticsA2''.
** Over in ''VideoGame/FinalFantasyThe4HeroesOfLight'', it seems inns exist 50% to regenerate health and actions, 50% so heroes have somewhere to skulk out of early in the morning because ''4 Heroes'' is basically ''LetsSplitUpGang: The Game''. Junita in particular falls victim to this ploy from ''both'' the male heroes, two towns ''in a row''.
* Sagacious Zu in ''VideoGame/JadeEmpire'', around the time you infiltrate the Lotus Assassin headquarters, a decision he advised against.
* Zelos does this on a few occasions in ''VideoGame/TalesOfSymphonia'', including the Tethe'alla Base and Flanoir. [[spoiler:He's actually a spy for Cruxis and the Renegades]].
* In ''VideoGame/ProfessorLaytonAndTheUnwoundFuture'', Layton does this [[spoiler:and when he comes back, it's actually Don Paolo in disguise]], and so does Luke later on [[spoiler:due to being upset by his father planning to move, separating him from Layton]].
* Pinocchio in ''VideoGame/KingdomHeartsChainOfMemories''. While Gepetto says he's happy as long as Pinocchio is around, Pinocchio blames himself for them being stuck inside Monstro and wants to find a way out, sneaking off to do so.

[[AC:WesternAnimation]]
* ''RudolphTheRedNosedReindeer'': Rudolph feels he's endangering the others because his nose attracts the [[BigfootSasquatchAndYeti Abominable Snowmonster]], so he leaves them in the middle of the night.
* In the ''WesternAnimation/AvatarTheLastAirbender'' episode "The Awakening", Aang feels he needs to regain his honor by fighting the firelord alone, and so he sneaks off the ship that the gang is currently hiding out on.

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