->''"This Sonic was a monster, a pure evil, sadistic, all-powerful, nightmarish, demented monster... and all of his victims, including Tails, Knuckles, Robotnik and possibly Kyle, are just his little toys, and the game is the very gateway into his chaotic, nightmarish world and the very Hell his victims are trapped in."''
-->-- '''Tom'''

''Sonic.exe'' originated as a {{Creepypasta}} by JC the Hyena seen [[http://trollpasta.wikia.com/wiki/Sonic.exe here]] concerning a man named Tom who receives a bizarre CD in the mail from his friend Kyle, who hasn't heard from in a while. [[GenreBlindness Disregarding Kyle's note telling him to destroy the CD]], Tom plays it and is disturbed by the title screen showing Sonic with [[RedEyesTakeWarning bleeding red eyes]] [[BlackEyesOfEvil with black sclera]]. As he plays the game further, Tom bears witness to just how monstrous this incarnation of the blue hedgehog really is.

Since then, ''Sonic.exe'' has received fan-made sequels and has also been produced into a video game of sorts that replicates the experience ([[ThisIsReality sans Sonic actually]] [[TheFourthWallWillNotProtectYou coming out of the screen]]), by YouTube user [[http://www.youtube.com/user/MY5TCrimson MY5TCrimson]]. The WebVideo/SomeOrdinaryGamers walkthrough of the game can be watched [[http://www.youtube.com/watch?v=tfQcXVk9QUs here]].

A sequel (also in video game form, and made by [=MY5TCrimson=] too), based on a spinoff, ''Sally.exe'', is available [[http://gamejolt.com/games/platformer/sally-exe-the-game/20920/ here]].

A fan film is also being produced. Teaser for that is [[http://www.youtube.com/watch?v=Ahb3XK2DVjQ here]].

''[[BlatantLies An Ordinary]] [[SuspiciouslySpecificDenial Sonic 1 ROM Hack]]'', a {{crossover}} [[GameMod ROM hack]] of the original ''VideoGame/SonicTheHedgehog'' video game, was released at Sonic Hacking Contest 2013. In this game, Sonic.EXE invades the game and targets the genuine article. Unfortunately, the author was unable to complete the game before the contest deadline, so [[NoEnding Star Light Zone and Scrap Brain Zone are]] DummiedOut. However, he has recently confirmed that he is working on a complete version of the game, two years after its original release.

A fan film has been created as part of a Youtube series titled Tales from the Consoles as the pilot episode. To watch it click [[http://www.youtube.com/watch?v=NZIFewmNYaw here]]

In 2013, the [[http://johnny-hedgewolf.deviantart.com/art/Round-2-the-Sonic-exe-Sequel-410541265 official sequel]] was made. However, it doesn't focus much on the game itself (in fact, only two of the three new scenarios were described), rather what happens when you play the game.

Since its creation, the game has also spawned many clones of it, including SuperMario.exe and VideoGame/SunkyMPEG.
!!''Sonic.exe'' provides examples of:
* AllThereInTheManual: At one point, The author to the original Creepypasta [[http://masterggg.deviantart.com/journal/Sonic-exe-finally-revealed-333606342 revealed X's official Backstory]] which, amongst other things, explains his nature, his personality, why he resembles Sonic in the first place, how he's able to steal his victim's souls and what he actually does to his victims.
* AntiFrustrationFeatures: ''An Ordinary Sonic 1 ROM Hack'' allows monitors to respawn. The reason for this is so that Sonic will always have a way to temporary return his world to normal and prevent Sonic.exe from killing him. There are also more monitors in general in the hack compared to the original ''[[VideoGame/SonicTheHedgehog1 Sonic 1]]'', because the author said that the game would've been UnwinnableByDesign otherwise, but he also stated that the additional amount that was put in wouldn't end up making the hack "too easy".
* AndIMustScream: According to the [[AllThereInTheManual backstory for the titular character]], this is the fate of all Sonic.exe's victims due to him simply taking their souls and placing them in bodies that look like Sonic the Hedgehog characters just so that he could "make them his slaves", as well as killing their "bodies" in cruesome manners.
* ApocalypticLog: The letter written by Kyle that comes with the package, as well as Derek's diary.
* TheBadGuyWins: In-game, X succeeds in killing Tails, Knuckles, and Eggman in Tom's playthrough. In Derek's playthrough, he's killed Shadow and Sally, though Derek refuses to finish the game as Rouge. [[spoiler:Outside the game, X has claimed many victims thanks to Shannon Goldman and the Cult of X distributing the game, and will go after anyone else next.]]
* BlackEyesOfEvil: The {{Zalgo}}-ified title screen.
* BrokenHeel: Tails slips when running from X in 'HIDE AND SEEK'.
* CheckPointStarvation: ''An Ordinary Sonic 1 ROM Hack''. At first it's [[AvertedTrope averted]] in the normal world, where all of the checkpoints keep their original spots. It is then played very straight in the DarkWorld. This means that [[HopeSpot you could be closing in on one of them]] [[FailureIsTheOnlyOption only for the game to warp you to the Dark World, causing it to vanish]], and instead have you risk starting the whole act over again should you die from anything there.
* CosmicHorrorStory: A bizarre attempt at one, given X's nature and what it does to people, not to mention the theft of souls and all that.
* ContinuityNod: Tom and Kyle are mentioned in the sequel. Apparently, they weren't the first to play it...
* DeadPersonImpersonation: [[spoiler:Kyle]]'s fate in [[http://spinpasta.wikia.com/wiki/Sonic%27s_Hell this spinoff]].
-->'''[[spoiler:X]]''': No one will ever notice what happened to him, not even his family. Why? Because I took his place.
* EldritchAbomination: X himself is this. According to his [[AllThereInTheManual official backstory]], he was created in the gap between dimensions and had originally did not have an appearance resembling Sonic himself. He's omnipotent within his home world, to the point where he can make his world seem a lot like Sonic's at first glance just to give his victims a sense of false security. And the Sonic characters that X kills? [[AndIMustScream Those are actually his previous victims, trapped in the bodies of Sonic characters and forced to be his "slaves"]] (all the while they're being killed in-"game" in very gruesome manners just to play with future victims before he steals their souls).
* EvilLaugh: X does it regularly. Tom comments that it sounds like that of [[VideoGame/FinalFantasyVI Kefka]]. The playable version uses Kefka's laugh, naturally.
* EvilTwin: X to the real Sonic. According to [[AllThereInTheManual backstory information]], however, he didn't start out that way. He only adapted an appearance resembling Sonic because [[ItMakesSenseInContext he's a huge fan of him]].
* TheFourthWallWillNotProtectYou: Several hints of this are seen in the text screens, such as it asking "READY FOR ROUND 2, TOM?"
** [[http://hazard-the-porgoyle.deviantart.com/art/An-Ordinary-Battle-Amongst-Familiar-Hills-407323136 An Ordinary Battle Amongst Familiar Hills]]. [[BlatantLies Just a harmless fan-drawn image of Green Hill Zone, is all]].
* FullNameUltimatum: In the sequel, when X [[spoiler:cuts off his contact with Cole]], Derek exclaims, "Goddamn you Sonic.exe!!!"
* GoryDiscretionShot: The game cuts to black when X lunges at Tails and Knuckles, followed by a high-pitched scream and a laugh.
* HopelessBossFight: You get into one of these when playing as Knuckles. You can try to punch X, but he teleports away every time, and eventually Knuckles will just break down crying.
* HopeSpot: [[spoiler:"There is a way to release ourselves. A spell to obtain our souls once more. But we must speak it - but when we speak - no sound. We are all deaf. So failure is inevitable."]]
* InterfaceScrew: [[spoiler:In Version 5, before the next Japanese text appears, the UI starts glitching out with "SCORE" and "RING" being mirrored and eventually the UI slowly disappears altogether.]]
* JumpScare: The high-pitched scream that emits from X's victims. Also, the static and some of the images appear as such.
* LastStand: [[spoiler:The protagonist, along with a few other people in [[http://spinpasta.wikia.com/wiki/Anti-Sonic_dll Anti-Sonic.dll]].]]
* LuckBasedMission: ''An Ordinary Sonic 1 ROM Hack'' as a whole. When a level begins, it takes 12 seconds and a half for the level to warp to X's world. After you escape once, the timing of subsequent warps is random. This can lead to unwinnable situations as levels are only beatable in their normal version.
* {{MST}}: WebVideo/{{Retsupurae}} has done [[http://www.youtube.com/watch?v=3wZhJ2vGj7E a reading of the creepypasta]] in their usual (cynical and negative) style.
** Creator/{{Yuriofwind}} [[http://www.youtube.com/watch?v=GVjkgX1rlSo has a reading]] of the story's "first" act, but he summarized the rest, because the rest is pretty much the same thing as the part he read.
** WebVideo/BadCreepypasta has done an MST reading of [[http://www.youtube.com/watch?v=1zO9rTlLip0 the]] [[http://www.youtube.com/watch?v=N6cfX6z7tYE original]] [[http://www.youtube.com/watch?v=zKm9W7lBKjA story]] then later [[https://www.youtube.com/watch?v=gOhoX4vjBxs riffed]] [[https://www.youtube.com/watch?v=_hKfjX1_Xyo the]] [[https://www.youtube.com/watch?v=Vd3YCpU33ok sequel]] while playing a drinking, getting hammered while mocking the story.
** WebVideo/TheAnnotatedSeries did this visually to the game version as a Hallowe'en special.
** ''Tales from the Consoles'' has riffed the creepypasta in [[https://www.youtube.com/watch?v=NZIFewmNYaw the pilot episode]].
** ''Masterpiece of Shit Theater'' has offered [[https://www.youtube.com/watch?v=kqvgwkyYYzo its own reading.]]
* NightmareFace: But of course. At the end of Eggman's level, ''[[JumpScare a hyper-realistic representation of him]]'' appears on-screen.
* NoNameGiven:
** The original creepypasta never does give a name for the demonic EldritchAbomination that terrorizes the narrator, with "Sonic.exe" being the most popular FanNickname to distinguish him from the original Sonic. According to [[http://masterggg.deviantart.com/journal/Sonic-exe-finally-revealed-333606342 the original author's follow-up]], [[AppropriatedAppellation the character has taken the nickname as his own name]]. The sequel validates this name, as well as giving him the alias "X".
** In ''An Ordinary Sonic 1 ROM Hack'', the character is referred to simply as [[SpeakOfTheDevil Him]].
* NothingIsScarier: Eggman's level takes place in a long, empty hallway that gradually dims as he descends each level. Considering what has already been seen by that point, Tom could only wonder what would happen to Eggman.
* OmnicidalManiac: After you finished playing, your soul is ripped from your body, you get a number scratched on your chest, and your computer's hardrive is wiped of everything except the Sonic.exe file.
* PerspectiveFlip: [[http://www.fanfiction.net/s/8493944/1/Sonic-exe-Through-the-Eyes-of-the-Characters Through the Eyes of the Characters]], played through, well, [[CaptainObvious the game's characters]], X himself, [[spoiler:and one of his unfortunate victims.]]
* PrimalFear: In the text version of ''Sally.exe'', half of Amy's face is left with holes, triggering the reader's trypophobia.
* RedEyesTakeWarning: The first sign that something is horribly wrong with this version of Sonic.
* SensoryAbuse:
** In Hill Act 1, when you first run into X there's a static noise that starts layering on itself, becoming louder and louder.
** And don't forget that bloodcurdling scream.
* SlasherSmile: You think?
* TooDumbToLive: Tom in a nutshell.
* UnwinnableByDesign: The "games" X presents himself in are actually inescapable traps used to torture and mangle his victims. The [[ControllableHelplessness control]] the player has over the characters is simply a fašade X uses to [[YouBastard torment the player]] along with the characters.
* WouldHurtAChild: X kills Tails. {{Subverted|Trope}} if you know via [[AllThereInTheManual X's official backstory]] that they're actually X's previous victims trapped in a body resembling Tails'.
* XtremelyKoolLetterz: The demon known as "Sonic.exe" also goes simply by "X".
* YouBastard:
** As Tom plays the game, Tails, Knuckles, and even Eggman ultimately fall prey to X. Following Knuckles' demise, Tom receives a message that tells him [[spoiler:"So Many Souls to Play With, So Little Time...Would You Agree?" Tom then comes to the conclusion that he has sent these characters to their doom, just as Kyle has when he played it. When you get down to it, the game is deliberately designed as such.]]
** And in Sally.exe, Cream, Amy, and Sally also meet their end at his hands.
** In the playable video game version where the player cannot keep them from dying either.
** The narrator in the spinoff [[http://spinpasta.wikia.com/wiki/Anti-Sonic_dll Anti-Sonic.dll]] blames [[spoiler:Sonic fans (and to some extent the reader) for writing X into existence with their fanwork, eg. fanart, fanfic, etc.]]
** Even worse, in the sequel, [[spoiler:it's revealed that the Sonic characters who died are the representations of human souls who became X's slaves.]]