[[caption-width-right:320:[[OhCrap Hello, do you want to play with me?]]]]
->''"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]]... [[ParanoiaFuel hopefully]]), by YouTube user [[http://www.youtube.com/user/MY5TCrimson MY5TCrimson]]. The WebOriginal/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.

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.

!!''Sonic.exe'' provides examples of:
* AdaptationalVillainy: The lovable blue hedgehog is now a demonic, murderous monster who [[AGodAmI acts as if he's God]] and torments any poor soul that encounters him, including his own best friends.
* AndIMustScream: Tails, Kuckles & Eggman end up in the [[{{Understatement}} evil]] X's realm for all eternity...
* AntiFrustrationFeatures: ''An Ordinary Sonic 1 ROM Hack'' will allow monitors to respawn.
* ApocalypticLog: The letter written by Kyle that comes with the package, as well as Derek's diary.
* AssholeVictim: Eggman, though one will likely feel sorry even for him.
* 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 [[OhCrap slips over]] when running from X in 'HIDE AND SEEK'.
* CosmicHorrorStory: A bizarre attempt at one, given X's nature and what it does to people, not to mention the devouring 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.
* DownerEnding: In a story/game like this, what did you expect?
* EldritchAbomination: The fastest thing alive has now become the foulest thing alive. This is made even more evident by X's newfound abilities to fly, appear in puffs of smoke, and essentially ''glitch'' the game to his advantage.
** WordOfGod, according to [[http://masterggg.deviantart.com/journal/Sonic-exe-finally-revealed-333606342 this DeviantArt journal]], states that this Sonic isn't even Sonic at all. He's a deity born within a void separate from our dimension, made entirely of dark matter, and he didn't even have a real body until learning of our world and Sonic. It was then and there that he became hooked on the Sonic series to the point of copying his body and form. With black eyes and blood dripping from them, but still. The sequel pushes this even further by giving him another name, X.
* EldritchLocation: [[spoiler: In the post-game Sonic stage, Sonic goes through a pretty weird-looking location, that eventually starts to look like the Giygas stage.]]
* EvilLaugh: X does it regularly. Tom comments that it sounds like that of [[VideoGame/FinalFantasyVI Kefka]].
** The playable version uses Kefka's laugh, naturally.
* 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.
* 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.
* KillEmAll: All Tails, Knuckles, and Robotnik die a brutal death in the hands of the monster.
* 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 (pretty much 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.
** [[http://www.youtube.com/watch?v=1zO9rTlLip0 BAD]] [[http://www.youtube.com/watch?v=N6cfX6z7tYE CREEPY]][[http://www.youtube.com/watch?v=zKm9W7lBKjA PASTA]] has done an MST readng of the story while playing a drinking game, getting hammered while mocking the story.
** WebVideo/TheAnnotatedSeries did this visually to the game version as a Hallowe'en special.
* 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: The creepypasta and game both run on this element. Such examples include how the scenes have changed, text boxes have been altered, and Sonic is behaving... oddly. A particular example occurs in the first level where Tails runs along what looks like Green Hill Zone with oddly no enemies or rings, with a sense of unease observed by the music. Then he finds the trail of murdered animals...
** To say nothing of Eggman's level which starts with him walking down a hallway, with in mind what has already been seen.
* OhCrap: Several moments, but the crowner has to be [[spoiler: [[WhamLine "READY FOR ROUND 2 TOM?"]].]]
* 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.]]
* RedEyesTakeWarning: The first sign that something is horribly wrong with this version of Sonic.
* SlasherSmile: You think?
* [[TrademarkFavoriteFood Trademark Favorite Souls]]: X [[CaptainObvious obviously]] has a taste for gamers and sonic fans, [[spoiler: but his true favorite souls to torment are gamers who like to smack talk Sonic.]]
* TooDumbToLive: Played with. While many criticize Tails for approaching X, [[spoiler:the game is rigged so the little guy has no choice...]].
* WhamLine: "'X' is really called 'Sonic.exe'."
* WouldHurtAChild: The bastard ''kills'' Tails...
* 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. [[spoiler:Seeing the characters cry, particularly Tails, will make you feel like a bastard.]]
** 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.]]

-->[[spoiler:[[OhCrap READY FOR ROUND 2, TROPER?]]]]