[[quoteright:320:https://static.tvtropes.org/pmwiki/pub/images/SonicAxiomTitleScreen_9288.png]]
[[caption-width-right:320:[[TrueCompanions Bros]] since [[VideoGame/Sonic3AndKnuckles 1994]].]]

Dr. Robotnik is back to his old tricks, [[UnwillingRoboticisation turning animals into robots]], industrializing pristine environments, and generally making a mess of things. [[ExcusePlot Are you a bad enough 'hog to teach him a lesson?]]

''Sonic Axiom'' is a ''Franchise/SonicTheHedgehog'' fangame assembled by Vexer and released in its latest form in 2011. Its game engine is based on the fan-made ''Sonic Worlds'' engine.

Inspired by the design of the classic ''Sonic'' platformers, ''Sonic Axiom'' distinguishes itself with fantastic visual aesthetics (albeit many of those modified from pre-existing resources), impressive and diverse level design, and a huge amount of content for a fangame: Three playable characters (Sonic the Hedgehog, Miles "Tails" Prower, and Knuckles the Echidna), eighteen full-fledged levels, nine bosses, and seven original special stages, each with a [[BonusStageCollectables Chaos Emerald]] you can collect or ignore.

[[http://www.mediafire.com/?0rcb97g9d1dyvxn You can download the game from here.]] Have fun!
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!!Tropes, rolling around at the speed of sound
* AlliterativeName: Like ''VideoGame/SonicTheHedgehogCD'', ''VideoGame/Sonic3DFlickiesIsland'', and ''VideoGame/KnucklesChaotix'', the names of the levels employ alliteration, to a slightly-cheesy degree. There's Coastal Causeway Zone, [[AmusementPark Neo Night Zone]], [[RuinsforRuinsSake Riptide Relic Zone]]...
* BigBad: Unsurprisingly, Eggman serves as the main antagonist of the game.
* BonusStage: The Special Stages in this game are somewhat unique in that they aren't in some 3D realm, like those of practically every official Sonic game and quite a few fangames. Instead, the player must traverse 2D platforming segments and reach a certain elevation, both within a time limit ''and'' with a prerequisite number of rings!
* EvilLaugh: Right before the FinalBoss, Eggman lets one out.
* FinalBoss: Eggman's HumongousMecha that resembles the [[VideoGame/SonicCD EGG-HVC-001]] is the last opponent of the game.
* GreenHillZone: Essentially what Coastal Causeway Zone is.
* HailfirePeaks: While most of the zones mostly stay within the confines of a single setting, two in particular stand out from the rest...
** Glacial Galaxy Zone is a wonderful mix of IcePalace and {{Tomorrowland}}.
** Molten Meltdown Zone is a jamboree of ShiftingSandLand, LethalLavaLand, and DugTooDeep, with trace bits of PalmtreePanic and EternalEngine.
** The boss act of Machine Mayhem is a dramatic pairing of EternalEngine and a vast SkyscraperCity.
* NoPlotNoProblem: It's never really explained what cheeses off Sonic & Co. enough to chase Eggman down this time. Who knows? Who cares?
* OxygenMeter: Back with its usual effect in ''Sonic'' platformers. Riptide Relic Zone, the only zone containing water in significant amounts, has a monopoly on the only [[VideoGame/Sonic3andKnuckles elemental shield]] in the game, which allows the player to traverse underwater without having to worry about gathering air bubbles.
* PreFinalBoss: Metal Sonic is fought directly before the FinalBoss battle against Eggman in [[EternalEngine Machine Mayham]].
* RiseToTheChallenge: Robotnik pulls a particularly nasty one in the boss level for Steel Station Zone. Just as you encounter him, a [[GrimyWater purplish liquid]], much like the [[VideoGame/SonictheHedgehog2 Mega Mack from Chemical Plant Zone]], will start to rise. This new goop will [[OneHitKill instantly kill]] the player if they're ankle-deep in it.
* SuperMode: All 3 characters can go for this if you care. Gather the Chaos Emeralds and then get 50 rings...
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