History VideoGame / SonicChronoAdventure

* DoubleJump: Aside from [[VideoGame/SonicBeforeTheSequel After the Sequel's]] Bubble Shield, the Hover Sneakers can give an extra boost to Sonic's jump height. In v1.1, the Bumper Gloves also function like the Bubble Shield, but it also attacks enemies within its radius.

* DoubleJump: Aside from [[VideoGame/SonicAfterTheSequel After the Sequel's]] Bubble Shield, the Hover Sneakers can give an extra boost to Sonic's jump height. In v1.1, the Bumper Gloves also function like the Bubble Shield, but it also attacks enemies within its radius.

* DebugMode: [[spoiler:Hold the P and Q keys together]] to be able to swap between Sonic's abilities and Gerem or even the otherwise unplayable Tails at will. No key in this mode seems to enable Sonic's [[spoiler:dark transformation]], though. Also of note is that pressing P at the [[spoiler:window resolution screen in version 1.0 let's you check out the FinalBoss.]]

* BookEnds: [[spoiler:You learn that Sky Empire was abandoned because [[BeenThereShapedHistory Sonic's been through the past and stopped Eggman there as it happened]]]].

* SequenceBreaking: Once you obtain the Hover Sneakers, it's possible to fly over the barriers to the left in Sky Speedway Zone South, leading you to Sky Speedway Zone West when it's normally accessible only late in the game.

* AbandonedArea: To some extent, Forced Fortress Zone, which was used by the rebels until TheEmpire tore it down. Afterward, it becomes Great Gap Zone and part of Wild Winter Zone, and its ruins is only filled with Polems.

* [[spoiler:BittersweetEnding: After defeating a dark-powered Eggman and his robot in the past, Sonic is taken back to Sky Empire Zone present without a heartfelt farewell to the residents in the past, thus having Gerem and the rest assume that he sacrificed his life, and Sky Empire Zone then remains uninhabited for the next century to come because of the destruction. But it's not so bad! They even erected a Sonic statue as "The Savior of the Sky Empire", the very same statue you saw earlier in the beginning of the game.]]

* {{Metroidvania}}: Progression still feels linear, though.

* PuzzleBoss: The battle against Grandpe uses its level's main gimmick against it, that is, aligning the circles in the the GUI with the correspondent orbs.

* ChekhovsGun: Near the beginning of the game, there's a statue that suspiciously looks like Sonic.
** Just before Sky Empire gets [[spoiler:consumed by Eggman's new powers]], you can see a hedgehog-looking robot in the container.

* GuideDangIt: The Chaos Emeralds, which are scattered all over the world. Thankfully they're only in the present time, so you don't have to dive through the past as well for them.

* BottomlessPits: Averted. Since this is a [[Metroidvania Metro]][[InsistentTerminology nic]]-type game, where you only have one sole life, pits and other similar instant-death hazards are gone.

* AmusementParkOfDoom: Power Park Zone.
* AttackOfThe50FootWhatever: [[spoiler:Coconuts]] in his second phase.

* BookEnds: [[spoiler:You learn that Sky Empire was abandoned because Sonic's been through the past and stopped Eggman there as it happened.]]

* [[spoiler:HijackedByGanon: Once you defeat EGGATS in the past for seemingly the last time, a time rift appears in its place and Eggman is sucked right in. It turns out the rift that sucked Eggman in spat him out from before the past's events. This allowed him to learn the entirety of Sky Empire, the monsters on South Lakes, and replace the scientist Dr. Ucano by making an accident look like his body was damaged and changed, and used the empire's laws to make him become the ruler. All of this happens before the past events where Sonic, ATS, and Present!Eggman enters, and yet Past!Eggman gets his biggest plans to roll in secret. In short, Eggman hijacked EGGATS ''and'' himself.]]

* DarkerAndEdgier: Quite so. Monsters that go wild upon seeing any animal on sight inhabit South Lakes, and there's Rebels formed because TheEmpire has brutal laws on nearly everything put up by Dr. Ucano, [[spoiler:who actually happens to be Eggman]]! And that's not even getting into the plans he has for the entire empire.

* Tomorrowland: Angel Terminal Zone.

* BookEnds: [[spoiler:You learn that Sky Empire was abandoned because you've been through the past and stopped Eggman as it happened.]]

* ExpositionFairy: Rodolia the Bug hangs on Sonic's forehead for the majority of the game. She barely does much to help out, though, only speaking for Sonic's sake.

* EverythingIsBetterWithPrincesses: Kinda downplayed. She doesn't have much significance on the plot aside from Grem trying to see her, and even then, she only lasts for a few screens. [[ChuckCunninghamSyndrome No one even knows what happened to her afterwards.]]

* GuestStarPartyMember: Grem.

* MushroomSamba: Upon reaching the construction area's elevator in Sky Empire Zone, you enter into a trippy area where it looks fine at first, until it starts getting obviously wrong. You can still control Sonic and run around beating baddies, but as part of the area, you don't gain nor lose Rings (and Silver Rings too). Oh, and you run into Grem and the princess multiple times before running into many of them at once. You even take "damage" from touching them, too.

* {{Metroidvania}}: Progression still feels linear, though.

* {{Metroidvania}}

* SceneryPorn
* TimeTravel

* PuzzleBoss: The battle against Grandpe uses its level's main gimmick against him, that is, aligning the circles in the the GUI with the correspondent orbs.