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''Sonic: Before the Sequel'' is a ''Franchise/SonicTheHedgehog'' FanGame made by [=LakeFeperd=] in the ''Sonic Worlds'' engine. Originally released near the end of 2011, it got a update in the following year with a unique soundtrack by Falk Au Yeong, [=KgZ=], Andy Tunstall and Funk Fiction.

It begins just after the end of [[VideoGame/SonicTheHedgehog1 Sonic 1]], when the Chaos Emeralds suddenly teleport Sonic to a place where he can see Dr. Eggman's [[KillSat Death Egg]] being built far away. Sonic sets out to stop Eggman's plans and later meets Tails, who is eager to help him.

Check out the game and have fun: [[http://www.4shared.com/file/THq0Dnri/Sonic_Before_the_Sequel.html (First Version)]][[https://www.youtube.com/watch?v=NOiCa7IgpCo (SAGE 2012 Release)]]

A sequel named ''VideoGame/SonicAfterTheSequel'' [[http://sonicfangameshq.com/forum/showthread.php?t=7466 has been released,]] and a side game called ''Sonic: Before the Sequel Aftermath'' [[https://www.youtube.com/watch?v=h4DnpTZ7F2Q has also been released.]]

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!!This game provides examples of:

* AddedAlliterativeAppeal: All of the zone names (except for the Death Egg).
* AdvancingBossOfDoom: Most of Sonic's boss fights work this way, [[spoiler:final boss excluded]]. Tails fights the unnamed sphere badnik on-the-run in Perilous Paradise.
* AndTheAdventureContinues / BookEnds: [[spoiler:The good ending leaves off immediately where the gameplay of ''Sonic 2'' begins.]]
* AutoScrollingLevel: The special stages.
* BehindTheBlack: In the opening scene, Sonic notices the Death Egg faaaaar away in the background, but ignores the seventh Chaos Emerald that was a couple feet away from him, hidden by the camera. In the UpdatedRerelease, this scene has been deleted. Instead there's a cold opening before the title screen that tells essentially the same scene, but without the Chaos Emerald being involved.
* BlackoutBasement: Parts of Acts 2 and 3 of Titanic Tower Zone.
* BonusLevel: Can be entered from the third act of almost each zone (Cloudy Crowd's giant ring is oddly in Act 2, and Act 3 doesn't have one). They're called Special Stages as per series tradition, but they're inconsequential and just for racking up extra lives.
* BossRush: Available after beating the game with the good ending.
* CallBack and CallForward: Lost Levels Zone pays homage to the scrapped zones of ''Sonic 2'' in each act... a game that chronologically is yet to happen. [[MindScrew Interesting paradox.]]
* CutsceneIncompetence: In the cutscene before Fortress Flow, Sonic gets hit by an attack he could have easily dodged so the player can know that the bubble shield offers no protection in this game.
* DoubleJump: The Bubble Shield in Fortress Flow Zone allows Sonic to Double Jump.
* DiegeticSwitch: Turning the lights on and off in Titanic Tower Zone also causes the music to switch in and out.
* {{Dubstep}}: One of the themes in Star Shores turns into this under the influence of Fuzzies, and Metro Madness Act 3's theme and the themes for Titanic Tower Act 3 and the boss have some elements.
* EurekaMoment: [[spoiler: When Tails realizes he can use his... well, tails to move faster than he could by running.]]
* ForegoneConclusion: Sonic can't stop the launch of the Death Egg. Well, he can in the BossRush, but that's just a "FAKE END".
* GameBreakingBug: Thanks to a problem with older versions of the Sonic Worlds engine, the OxygenMeter at Perilous Paradise Zone runs out at normal speed even if the game is lagging for you.
** Due to bugs with Adobe Flash, which all the of cutscenes run in, the game can crash on some systems as soon as a cutscene tries to load. This is a problem with the ''Sonic Worlds'' engine that is essentially unfixable, leaving some players no choice but to play the game with cutscenes off and go to Website/YouTube to find out what they're missing.
*** Unfortunately this introduces another bug. By choosing to select the cutscenes off, the game won't allow you to [[spoiler:fight against the PerfectRunFinalBoss, instead it takes you straight to the ending screen.]]
*** Thankfully [=LakeFeperd=] included an option to skip through levels with the U key due to the fact that Mac users couldn't save, so you can still access the boss.
*** Looks like Flash Player 18 works! Use [[https://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html#Flash%20Player%20archives Adobe's Flash Player archives]] and install it (direct download link [[https://fpdownload.macromedia.com/pub/flashplayer/installers/archive/fp_18.0.0.268_archive.zip here]]).
** In the PerfectRunFinalBoss, if you [[spoiler:hit Eggman ''after'' he starts exploding]], the game becomes [[UnintentionallyUnwinnable stuck and unable to finish]], forcing you back a couple levels.
* GetBackHereBoss: Most fights with Eggman either have Sonic chasing him or [[AdvancingBossOfDoom him chasing Sonic.]]
* GravityScrew: Present in Arcane Altitude and Death Egg, both of which have gimmicks involving reversed gravity as well as increased and decreased gravity.
* GreenHillZone: Star Shores Zone, which uses the past graphics of [[VideoGame/SonicTheHedgehogCD Palmtree Panic]].
* HeadsIWinTailsYouLose: [[spoiler:Originally, after being defeated, the FinalBoss blasts Sonic out of the sky in the ending cutscene.]] [[spoiler:In the 2012 version, Sonic simply falls from the arena as it explodes and you get to fight the boss again as Super Sonic if you get enough time points to get the good ending.]]
* HeroOfAnotherStory: Sonic and Tails spend the game alternating zones between them, so technically they're both on their own solo adventures, even when their paths cross in the latter half of the game. The only stage played by both of them is Arcane Altitude Zone.
* InterfaceScrew: [[VideoGame/YoshisIsland Fuzzies]] inexplicably show up throughout Star Shores Zone. Not only do they distort the game around Tails, they also slow him down and alter the music. Act 3 in particular [[TakeThat becomes]] {{Dubstep}}.
* {{Interquel}}: One that takes place between VideoGame/SonicTheHedgehog1 & [[VideoGame/SonicTheHedgehog2 its sequel]], hence the name.
* InTheEndYouAreOnYourOwn: Happens to Tails after [[spoiler:Titanic Tower, but is later triumphantly subverted]]. Then, [[spoiler:happens ''[[DoubleSubverted again]]'' to [[TheOnlyOneAllowedToDefeatYou enforce it on Sonic by Eggman]]]].
* LevelInTheClouds: The game has Cloudy Crowd. The cloud tileset is borrowed from that of the sky levels of ''Kirby Super Star'', though it also features tiles from Star Light and Chemical Plant. Other features include a magnetic pole that operates with a switch, springs that can make you jump high or low (depending on which end of the spring is touched when jumping), fans that can blow away clouds, and a jet platform with lights that tell when it will burst flames.
* MiniMecha: [[spoiler:''Before the Sequel'''s final boss is a much smaller version of VideoGame/SonicTheHedgehog2's final boss.]]
* MultipleEndings: There are three: the good ending you get if you complete the game with a positive number of time points; the bad ending, which you get if you have negative time points at the end, and the BossRush ending.
* MusicalNod: The soundtrack incorporates a lot of this, for example Green Hill in Hilltop Heights Act 2 and 3 and Green Grove in Star Shores.
** Lost Levels is ''full'' of this.
** Arcane Altitude Act 2 has a musical nod to [[VideoGame/Sonic3AndKnuckles Death Egg Zone]].
** Star Shores Act 3 has a nod to [[VideoGame/SonicTheHedgehog1 Star Light Zone]].
** The entirety of Cloudy Crowd Act 1's music is a remix of Believe In Myself from both [[VideoGame/SonicAdventure Sonic]] [[VideoGame/SonicAdventure2 Adventure]] games.
* OhCrap:
** The blue mantis enemies in Metro Madness Zone react this way when you get behind them, since they can't attack you from behind.
** Tails gets a similar reaction when he flies in Arcane Altitude Act 2, as the level constantly shifts him around while he's flying, making it a bit harder to pinpoint a landing spot.
* PerfectRunFinalBoss: In the SAGE 2012 edition only.
* RecycledSoundtrack: The entire soundtrack in the 1st version reuses songs ranging from other Sonic games to ''Franchise/{{Kirby}}'' games. The 2012 SAGE Edition mostly averts this with an [[https://www.youtube.com/user/sonicbts12 original soundtrack]], although some songs (the [[VideoGame/SonicColors Rotatatron theme]] and [[Music/OverclockedRemix Breathtaking Vision]]) were left in, and the special stages and cutscenes were left intact due to time constraints.
* RecurringBoss: Eggman is at it again for Sonic, while Tails deals with a rather tenacious robot shaped like an Egg-O-Matic.
* RecurringRiff
** Every act has its own theme, but most Zones will either have a RecurringRiff incorporated into the themes, or the act themes will be similar thematically.
** Titanic Tower, for example, has a RecurringRiff first done in a sort of Music/DaftPunk-style disco theme, then an '80s synthpop theme, then a more modern electronic style with some {{Dubstep}} elements.
* SceneryPorn: Like most of the [[Franchise/SonicTheHedgehog original series]], you can find notable landscapes in a couple of zones here and there.
* SecretLevel: [[VideoGame/SonicTheHedgehog2 Hill Top Zone]] and [[VideoGame/SonicColors Starlight Carnival]]. Hill Top is accessed by pressing U during the cutscene after the Hilltop Heights boss, while Starlight Carnival is accessed by spamming the U key in Rocky Ride to rapidly skip through the levels, which should end up taking you to the level after skipping the boss. Hill Top Zone seems to be finished, while Starlight Carnival is only 20 seconds long.
* SequentialBoss: Dr. Eggman's Unicycle Mecha in the 2012 version.
* ShoutOut: [[Franchise/StreetFighter Ryu]] [[SugarWiki/FunnyMoments Turtle Badniks]]?
** The way Tails enters Lost Levels is a shout out to the intro to [[VideoGame/KirbySuperStar The Great Cave Offensive.]] It even uses the same music.
** Boss designs are based off the style of ''Stunt Race FX'' characters.
** The Star Shore Zone also includes [[VideoGame/YoshisIsland Fuzzies]].
* SlidingScaleOfVisualsVersusDialogue: The only dialogue in the game comes in the GoldenEnding:
-->[[spoiler:'''Sonic:''' My plane!\\
'''Tails:''' Low fuel.]]
* SpaceZone: Arcane Altitude and Death Egg.
* StandardSnippet: The boss music of Perilous Paradise uses bits from Flight of the Bumblebee and In The Hall of the Mountain King, a stealthy nod to ''WesternAnimation/AdventuresOfSonicTheHedgehog''.
* SuperMode: [[spoiler:Available as an EasterEgg. S Monitors are hidden in the levels and pressing a certain key in the full main menu unlocks Super Sonic.]]
* SuperNotDrowningSkills: Fortress Flow Zone, in which Sonic gets a water shield that's immune to damage. Instead, you lose your rings when you're hit. No such luck for Tails, who must scrounge for air bubbles in Perilous Paradise Zone.
* TheOnlyOneAllowedToDefeatYou: See RecurringBoss above. Sonic and Tails never get to fight each other's nemeses. On both occasions where Tails is present for an Eggman fight, [[spoiler:[[ButtMonkey the kid gets swept off into the sky before it can happen.]]]] The second of these, considering [[spoiler:the events at the end of Cloudy Crowd]], doubles as a PlayerPunch.
* TimedMission: You have about two hours to beat the game, or the bad ending happens when you get there. Specifically, [[spoiler:you start ''Before the Sequel'' with 3400 time points, you lose one every 2 seconds, and if your time points are a negative value after the final boss, you miss the good ending.]] Oddly, in the 2012 version, [[spoiler:it still keeps counting time points during the PerfectRunFinalBoss, but as long as you reach it, you still get the good ending.]]
* UpdatedRerelease: [=LakeFeperd=] re-released the game with better graphics, custom sprites, and an original soundtrack along with a demo of After The Sequel at SAGE 2012.
* UnderTheSea: Fortress Flow Zone.
* VariableMix: Lost Levels Act 3 has two versions of the same theme that switch back and forth as Tails moves between the "desert" and "frozen" areas of the stage.
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