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Sonic Frontiers

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Title Screen

Sonic Frontiers

Developer: Sonic Team
Publisher: Sega
Platforms: Windows, Xbox One, Xbox Series X, PlayStation 4, PlayStation 5, Nintendo Switch
Released internationally: November 8, 2022

AnimationsIcon.png This game has unused animations.
ObjectIcon.png This game has unused objects.
GraphicsIcon.png This game has unused graphics.
MovieIcon.png This game has unused cinematics.
SoundIcon.png This game has unused sounds.
TextIcon.png This game has unused text.
Carts.png This game has revisional differences.
DummyIcon.png This game has unusual dummy files.

PrereleaseIcon.png This game has a prerelease article

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Sonic Frontiers is the first "open-zone" Sonic game, where Sonic and his friends end up in the distorted, yet realistic Starfall Islands, filled with a few shocking truths about their world's history.

Also notable for being the first game involved with SEGA's "Sonic × Inugami Korone" project, with several (currently Japan-exclusive) DLC packs featuring things such as Korone-themed gloves and shoes for Sonic, changing many of the sound effects to her making cute noises, and replacing the Koco with Listener-sans (one of Korone's mascots, a 2D drawn head representing her viewers, the Koronesuki).

To do:


Read about prerelease information and/or media for this game.
Prerelease Info


SonicFrontiersIcon RevisionalDifferences.png
Revisional Differences
Changes between updates, differences between platforms, etc.
SonicFrontiersIcon UnusedAnimations.png
Unused Animations
Unused animations which still remains in the game files.
SonicFrontiersIcon UnusedObjects.png
Unused Objects
Info on unused objects and their behavior.

Unused Textures


Space Save File Icon

Present in raw/ui/ui_common. This is an unused save file icon that shows a picture of space.

Space save file icon Sonic Frontiers.png


Unused Cyberspace stage icon

There is an unused stage icon in raw/ui/rpl_texture_arcade which shows the Cyberspace skybox. This icon can still be seen in-game using mods.

UiRANGE img stage w0d00 Sonic Frontiers.png

Unused Editor Font texture

Found in raw/decotext/editor is an unused texture file named "font_texture".

Unused "AncientFont" and Emerald Key Textures

Also present in raw/ui/rpl_texture. This may have been used for the Ancient's language.
In addition, "uiRANGE_img_exch_emeraldkey" seems to show different Vault Keys. Each of the Vault Keys have different color schemes.

Tails' Homing Attack Skill Icon

Found in the "uiRANGE_img_pause_skill2" texture contains an unused skill icon for Tails' homing attack.

Unused Tails homing attack symbol.png

Unused Fishing Icons

In raw/ui/ui_gamemodefishing contains these two unused icons found in the fishing shop textures.

Unused fishing icons Sonic Frontiers.png

Unknown Texture File

Present in raw/ui/ui_gamemodestage is an unused texture file.

Placeover Tower Koco Textures

Found in Update 2's raw/ui/ui_gamemodestage is a texture file that shows the placeholder text for the tower Kocos.

UiRANGE img map41 Sonic Frontiers.png

Dummy Textures

Found in the texture files, there are multiple dummy textures.


Sonic Forces Leftovers

Present in raw/ui/rpl_texture are several UI leftovers from Sonic Forces, which isn't too surprising given it was the previous 3D title.

Unused Audio

Early Action Chain Theme

Found in the Jukebox files in Update 1 (and is still in the jukebox files as of v1.41) is an earlier version of the Action Chain theme.
Notably, it has missing instruments and is somewhat incomplete compared to the final version.

Early Final

Unused Fishing Dialogue

The file voice_rangers_event_en.awb contains a few unused voice lines that relate to Big's Fishing. These are mainly for teaching the player the mechanics of the fishing minigame.
Notably, it teaches the player of the unused green ripple. This would require the player to hold the button while the white ripple overlapped it. There is also a voice line for Big telling you how much fishing would cost.

What do you wanna do, Sonic?
Nice choice!
Sorry, but I need more tokens than that!
Yes! You're doing great! I can't believe you got it on your first try!
Good job! Now do you see that green ripple? Keep reeling while the white ripple is overlapping it.
You'll need one coin to go fishing. What's your pleasure?
You don't have any coins? I bet there's more back on the islands.

Unused Sage Voicelines

The file voice_rangers_event_en.awb also contains a few unused voice lines for Sage. Interestingly, she talks about the Ancient's "Worldship", which is a structure that goes unused in the final game. However, it is still seen in one of the flashbacks on Rhea Island, and may be seen in the leaked footage from the SoJ Internal Meeting.

Perhaps now you'll give up, and just stay with me?
I'm still working on this. Return later.
It is what remains of the Ancient's worldship. It was their ark to this world.
Sonic, can you hear me? I have found a new route, join me!
Sonic, I believe I can access the ship's ruins. Join me!
Preparations are not complete. Continue exploring the island until then.

Unused Sonic Dialogue

Sonic has a lot of fully-voiced dialogue that got the final cut, and a lot that didn't. Interestingly, there are a lot of unused voicelines for the Kocos. There is some unused dialogue for collecting them and meeting up with the Elder and Hermit Koco. There is also a set of voicelines that were scrapped from Rhea Island.

Nothing but speed, style, and grace!
I bet I could do that even faster!
I'm so good it hurts!
That was cool.
Too easy, piece of cake!
There you are!
This way, little guys!
Found ya!
You're safe now.
Come with me!
Let's join your friends!
Come along now!
What're you doing there?
What's up little guys?
Oh! That ones way different.
That one looks different than the others.
Green Hill? How did I wind up on South Island?
Badniks! So Eggman is involved!
Something about all of this feels wrong.
Hey guys! Workin' hard, or hardly working? ..Yeah, that joke is as old as you, huh?
Now that's a door.
Hm, bridge is out. I don't think I can jump that.
Cool! Now I can keep moving!
Ha! No problem!
Piece of cake!
Woo! Just made it.
..and the crowd goes wild!
Nailed it!
What're you hiding in there for?
Let's get you back to the Elder!
Hey there little guy!
Man, you guys are all over the place.
Follow me, okay?
Well, at least your not hiding inside any pipes.
Found you!
..and a fine rattle-tinkle to you too!
Right this way!
Woah! Thats a big Koco.
Now thats a different looking Koco.
Echo! ..Hehe, never gets old.
Great, I've got sand in my shoes.
That was fun!
That was a nice change of scenery!
I never get tired of that!
Now you know why I am the best!
You're safe now!
Found ya!
This way, little ones.
What are you doing over here?
More Koco for the Koco pile!
Hermit and Elder are worried about you!
Jingle, jingle to you too!
Follow me!
Come 'ere, you!
This is no place for a Koco!
Hold up, how did Elder Koco beat me here?
No way, how'd Hermit Koco get out here?
Towers. All that's left.
Next target. Let's go.
Focus. Gotta keep going!
No, I'm moving. Can't feel it.
Almost finished!
Just this one left.
My friends have waited long enough.
You're almost free guys.
Visions.. So vivid!
Like I'm reliving, not just watching.
This is real, right?
I'm still here aren't I?
This is.. This is for..
My friends! This is for my friends, remember!
So cold now.. Numb.
Push through it.. Endure!
Objective.. Complete.
My name is.. My name is..?
No time to waste.
Let's.. go!
Can't keep them waiting.
Clock is tickin'.
I need those emeralds, stat!
Now is not the time to be running around guys!
Hurry back to Elder Koco!
I'm here to protect you this time.
Don't worry. I won't let it get you again.
There you are.
Come on little guys, hustle.
Anyone seen an emerald around here?
You guys are all over the place, aren't ya?
Hey! Found some more.
Elder Koco... I know them.
Faster.. Healthier.
Improved performance.
Elder Koco.. Are you trembling?
Hey Elder. I'll be quick.
Don't worry. I got this.
Thats, the Hermit Koco. We've met.
Seeds. Bring them seeds.
Stronger. Make me stronger.
Hermit Koco? What's wrong?
I need all the help I can get.
I've got more seeds for you.
Wish we were sharing an umbrella, Amy.
I need a way to cross that ravine.
Can't let their sacrifice be in vain. Gotta get those emeralds.
Time's running out, where are those emeralds?

Unused Subtitles

Knuckles' Alternate Backstory

Some scenes include unused subtitles describing an alternate version of Knuckles' backstory in the game; in this version of the story, Knuckles simply travelled to the Starfall Islands alongside Sonic, Tails, and Amy rather than being warped to the islands through cyberspace (as depicted in Sonic Frontiers: Divergence). This set of subtitles would have had Knuckles present on the Tornado in the intro cutscene and would have cut his Divergence exposition on Ares Island, alongside some of Sonic's references to his friends (prior to Ares Island) also including Knuckles.

Unused Events

Unused Cinematics

The Nintendo Switch version of the game contains a bevy of unused cinematics, including early versions of existing cutscenes, unused quick-time events, and even some totally unique cutscenes. Most of them have broken sound effects, or none at all. These cinematics are listed in order of the videos.

test_bo2115 - An early version of Wyvern spitting out its red path. The path itself doesn't move at all, and Wyvern's "whiskers" clip into its body.

test_sonic_walk - A test cutscene of Sonic walking and making various mouth poses. It also features the Chaos Emeralds, which rotate around Sonic as he walks and fly away at the end.

test_qe1080_result - An early version of Sonic's dance upon getting a Chaos Emerald. Appears to be identical to the final, but this cutscene never plays at this location in the final game.

test_qe2130_result - The same as above, but with no Chaos Emerald.

qe1310 - Perhaps the most interesting unused cutscene, this depicts Tails handing Sonic a Chaos Emerald. This never happens in the final game.

test_CutTiming_Sync_cam_SN - Sonic in a T-pose with a seemingly randomly panning camera.

test_ev3060 - An early version of the flashback cutscene from Chaos Island. Sonic and Tails use very basic movements, with not much easing and no lip-syncing. The cyber space effect does not appear, and instead of the hand-drawn art seen in the final game, this version simply sits on an in-game shot of the island.

test_qte_sample - A test quick-time event using Sonic's parry animation. If you fail the input, Sonic snaps to a "dead" pose where he'll lie on the ground.

test_sage_move - A test cutscene featuring Sage turning around from various angles and camera distances. Oddly, she uses her standard red color scheme, but with a blue eye. This never happens in the final game; she's always one color scheme or the other.

test_SN_exposure - Sonic T-posing in the void while the camera pans around him. Given the filename, this may have been used to test simulated camera exposure.

bo2020 - A rather amusing cutscene found in Wyvern's files. It depicts a Caterpillar revving up and slamming into another caterpillar, knocking it over. The only other time a cutscene features Guardians is in Chaos Island during the Knight chase, so perhaps it was meant to happen more often. The Caterpillars use otherwise-unused animations for revving up, spinning, and being flipped over with its legs twitching.

ga3220 - An unfinished version of the pinball table introduction.

Unused Tails Cutscene

There is an unused cutscene with Tails giving Sonic a Chaos Emerald. Notably, this takes place in Kronos.

Unused Realtime Events

In the files of the game, the pre-rendered cutscenes have unused versions that play in-game. These are labeled with the exact same ID as the pre-rendered versions, but with _mov tacked on to it. Some scenes, like ev1850 (the final horizon ending) and ev6010 (the base game ending), are segmented into multiple sets of scenes, starting at mov01 and going up.

Update 3 Events from Update 2

There is an earlier version of ev1700 found in Update 2. The main difference is that none of the flashback images appear, and the animation is stiff and incomplete. It is also located outside of Ouranos Island due to an incorrect MTX value.

There is also an early version of chl6xxx and ev1550. chl6xxx contains early versions of the cutscenes used to preview island challenges. ev1550 is the same, having the proper MTX values to set it's position.

Unused Supreme Attacks and Events

Found within Supreme's data are several unused events. According to director Morio Kishimoto on Twitter, these were being worked on up to the final deadline, but simply weren't finished in time. All of them lack polish, are not timed correctly, and end abruptly.

The first of the two rifle QTE events is an unused extended version of the final game's QTE with the file labeled "Zev_Rfl_Shoot02", where Supreme fires several more shots. In the final, only the very first shot and the very last cut are used.

The second rifle QTE is an entirely unique sequence with the labeled "Zev_rfl_Shoot01", where Supreme moves around the arena and fires his gun at different angles before making one big leap in an attempt to air snipe Super Sonic. In this QTE Supreme's bullets are a different color in this one compared to the previous one. Seemingly reflecting the Light and Dark Shots from the hacking Mini Game in Ouranos Island and the base game "The End" Space Shooter fight.

  • Zev_Rfl_Sp00 is a cutscene that depicts an unfinished version of Super Sonic's default Grand Slam, reused from Giganto's fight. Perhaps there was a chance it would have had a unique Grand Slam animation if development went on as planned. The location of this cutscene oddly takes outside Ouranos Island.
  • Zev_Rfl_Sp01 is a slightly modified version of Giganto's Clap and Bite Counter. This variant is unfinished, lacks sound effects, and the bite struggle has Supreme entering a default T-Pose state, and Super Sonic does not perish when failing the bite struggle. This cutscene and the previously mentioned one take place outside the island. Which is actually the location of Giganto's battle arena in the released version of the game.
  • Zev_Rfl_Sp02 is a modified version of Giganto's mouth laser attack where Super Sonic can be seen briefly preparing to deflect the animation. Also unfinished. It also includes a fail animation oddly enough that can only be seen when the player actively presses any other button that isn't the shown button in the QTE prompt. This cutscene is also located where Giganto is fought in the released version of the game.
  • Zev_Rfl_Bitlaser01 and Bitlaser02 are events triggered after the player parries Supreme's spin attack while his Bit Drones are active or Supreme is staggered after receiving enough damage. These events have been shortened to cut out segments. These segments showed Supreme summoning the turrets to aim at Sonic before firing. Bitlaser01 depicts Super Sonic flying straight forward with a surprised look and looking around with his eyes for a chance to escape. This would indicate his first encounter with the attack. While BitLaser02, the default cutscene triggered by the game, depicts Super Sonic actively moving around only to realize these large turrets have auto aim and Sonic has no choice but to take the attack head-on. Perhaps this could have been another QTE where the player could have had a chance to avoid being shot by the lasers.

In addition, the Update 3 version of the Supreme fight has two separate versions of the ending scene. They have different camera angles, and the second version seems to generally be buggier.

Unused Attacks include the following names in Supreme's text file under the "BossRifleBattleParam_ActionType" text.

  • AT_Counter_Blow (Giganto's swipe these have different animations from Counter01 to Counter04 that are all recycled from Giganto.)
  • AT_HomingLaser_Normal (Supreme remains stationary in Phase 1 or floats if he's in Phase 2 and shoots laser projectiles out of his backpack.)
  • AT_HomingLaser_Fly (Same as HomingLaser_Normal, except Supreme's on a flight-path shooting projectiles out of his backpack in a slightly faster attack speed.)
  • AT_Laser (Supreme spams homing laser projectiles from his mouth. Similar to the attack scene when Supreme retaliates after destroying his drones.)
  • AT_Sp01 (Giganto's Clap and Bite Counter)
  • AT_Sp02 (Gitanto's Laser Counter)

There are also parameters that are labeled AT_Shot1, AT_Shot2, AT_Shot3, and AT_Shot4. These correspond to Supreme's QTE events as there are also 4 interactable QTEs. As it currently stands in the game, AT_Shot3 and AT_Shot4 correspond to the unused Zev_Rfl_Shoot1 QTE with the dark shots. Triggering this attack through the battleparam alone soft locks the game. See the video to learn more.

AT_Shot1 and Shot2 reflect the original rifle QTE seen in the game.

Under the "smallBitLaserParam" section of text in a different rfl text file, Supreme's drones could do the following actions:

  • bulletType(Homing): Spawns dark missile projectiles and follow Sonic. They cannot be parried.
  • bulletType(Laser): The drones shoot a laser beam. Or at least they were intended to shoot a laser beam, the visual effect of the laser is not shown despite there being collision and Super Sonic does get staggered from it.

There are also unused animations for its attacks.

Unused Guardian Attacks

Unused Caterpillar Attacks

Caterpillar has a couple of attacks in it's data that didn't get used, but were eventually used in the Final Horizon. (The black shell shown in the video is a mod and not actually unused content)

  • AttackMassLaser is an unused attack that shoots a group of lasers in a straight line.
  • AttackFollowLaser is an unused attack that was eventually restored for the Final Horizon Caterpillar.
  • AttackCrossLaser is another unused attack that shoots a group of lasers shaped like an "X" (or a cross).
  • AttackSimpleRotationBullet is an unused attack that was seen in the leaked footage that was seen in the SoJ internal meeting. It was restored for the Final Horizon's Caterpillar.
  • AttackPlaneUpDownBullet is another unused attack that was restored in the Final Horizon.
  • AttackVerticalRoundBullet is an unused attack that seems to be a bullet version of "VortexLaser".
  • AttackCrossBullet is an unused attack that shoots bullets shaped like pyramids.
  • AttackTriangleBatteryBullet is an unused attack that was also restored in the Final Horizon update.
  • AttackShotgunBullet is an unused attack that sends a flurry of bullet orbs. This was restored for the Final Horizon Caterpillar.
  • AttackAirDropBullet is an unused attack that appears to be a variant of "ShotgunBullet", where it shoots out a bunch of bullets from its weak point.
  • AttackChaseShotObject is an unused and incomplete attack that doesn't really do anything. Sonic also seemingly gets hit by nothing as well.

In addition, there is another attack called "ChaseShot" but it does not function.

  • AttackWinderBullet is yet another unused flurry of bullets, and was restored for the Final Horizon.
  • AttackDiffuseLaser is a strange and unique laser attack that goes unused. It shoots lasers out of the sides of Caterpillar.

Unused Stage Layouts

Early 4-1 Layout

Looking at the stage thumbnail for 4-1, it seems to use an earlier .gedit/object layout from the final game. Instead of the balloons, there is a bridge of platforms that lead you to the other side.

The Stage Icon The Stage itself
4-1stageicon.png Sonic Frontiers 4-1ingame.png

Unused Open Zone Layouts

Early Kronos Island Layout

To do:
  • Get a render of the prototype Kronos Island and do some comparisons.
  • Look into the PS4 version, which has more leftovers from Early Kronos Island.

During development, Kronos Island, Rhea Island, and Ouranos Island were all originally the same landmass. This can be seen as late as the announcement trailer in December 2021, where it showcases areas of the final game's Rhea and Ouranos Island, making this a fairly late change. This change was made because playtesters thought the island was "too big" and "boring".[1] In the final game, Ouranos Island is a completely separate area. In one of the Egg Memos, Dr. Eggman refers to the Starfall Islands as "three piddly islands" rather than five. Presumably, this was written before Kronos Island was split up, and wasn't rewritten or rerecorded to account for the change (the Japanese script simply does not specify a number).

Kronos and Rhea Island are a strange case: in-game they referred to as different islands, but they both load the same terrain (w1r03). This means you can see areas of Kronos Island while playing on Rhea Island, and vice versa. However, the story still seems to be treating it as one single area; the cutscene upon entering Rhea Island clearly show areas only accessible on Kronos Island, and the minimap is the exact same for both islands, but cropped differently:

Kronos Island Rhea Island
SonicFrontiers KronosMinimap.png SonicFrontiers RheaMinimap.png

This Kronos Island split can even be seen in-game: Going high enough in Kronos or Rhea Island reveals that the water outline of Ouranos Island is still present, and vice versa.

Kronos/Rhea Island Ouranos Island
SonicFrontiers RheaOutline.jpeg SonicFrontiers OuranosOutline.jpeg
(Screenshots: Storm107)

The Nintendo Switch and PS4 versions of the game include a full, complete set of terrain for Kronos Island before the island was split up. This model is internally named "w1r02", and the final is "w1r03".

Early Height Map (w1r02) Final Height Map (w1r03)
SonicFrontiers betaKronosheightmap.png SonicFrontiers finalKronosheightmap.png

(Source: RobowilOFFICIAL)
Pre-Split Kronos Island

There are two object layouts for this map: w1r01 and w1r02.

  • w1r01 is assumed to be the first variant of the map, with it following the same naming scheme as Ares and Chaos Island in the files (w1r01, w2r01, w3r01). It is emptier, has all seven Chaos Emeralds collectable, and features Giganto in place of Supreme. It loads the w1r02 terrain files.
  • w1r02 is much closer to the final game's Kronos Island, with most of the same objects and Giganto where he is in the final game. However, it features several Rail Generator puzzles, while there is only of such puzzle found in the final game.

Early Ares Island Layout

If Sonic goes high enough in Ares Island, the ocean renders a watery outline of the island similar to the outline in Kronos/Rhea and Ouranos Island, implying that, along with having slight terrain differences, Ares Island was meant to be much larger.

Ares Ocean Sonic Frontiers.png
(Screenshot: InvalidFile)

Early Kronos Island Wind Map

The Playstation 4 version of the game contains an earlier version of Kronos Island's wind map. Notably, this version of the wind map has an island seemingly missing from w1r02.

Wind Map Early Height Map
Early Kronos Windmap Sonic Frontiers.png SonicFrontiers betaKronosheightmap.png

Early Chaos Island Wind Map

The Playstation 4 version of the game contains an earlier version of Chaos Island's wind map, depicting the island as having larger and more connected islands.

Wind Map Final
W3r01windmap.png Sonic Frontiers W3r01 splatmap.png
(Chaos Wind Map: Holoska)

Unused Challenges

Treadmill Challenge Variant

There is an unused variant of the treadmill Map Challenge in the Open Zone. Instead of having you run as fast as possible, this version of the challenge requires you to maintain a specific speed.

(Source: Sonic Frontiers Facts)

Unused Master Trials

"The Final Horizon" update introduces a new type of challenge called Master Trials. However, unused Master Trial chambers were found in the files for "Sonic's Birthday Bash". These layouts vary from having slight changes to the trials found in the final update to being completely different. The trials also do not have an intro with the Master Kocos.

(Screenshots: InvalidFile)
  • The first Master Trial is similar to the Snake Trial in the final game, featuring five Shell enemies with drastically increased attack speeds. However, the trial has a three-minute time limit, and Sonic can use all of his skills. This is the only Master Trial that uses the unused MistakeLimit parameter, which functions similarly to the lives system in the Open Zone side quests.
  • The second and third Master Trials are original layouts, featuring floating and falling platforms and each giving you thirty seconds to complete the trial. The only difference between the two are the type of enemies; the former features Cyclone enemies and a few Sniper enemies on top of slowly falling platforms, while the latter features Banger enemies. Sonic is able to use all of his skills.
  • The fourth Master Trial is extremely similar to the Crane Trial in the final game. Like the final, the trial has the Ninja Guardian, but has a shorter three-minute time limit. (compared to the final game's ten-minute time limit) Sonic also begins with a level 26 Attack Stat, and Ninja regenerates HP much faster.

Unused Pause Menu

There is an unused pause menu left in the game files from an earlier point of development. "Retry" will take you back to your last save point while Quit returns to the title screen.

(Screenshot: Gordon Ramsay/Fishly 101)
(Demonstration: Sonic Frontiers Facts)

Old Final Horizon Kocos

In the files for the "Sonic's Birthday Bash" update, there are older versions of the models used for the new Kocos found in Another Story. The Master Koco models are virtually identical but has a slightly different cap. When restored, most of the textures seem to be broken.

(Screenshots: InvalidFile)

Sonic's Idle Dialogue

Sonic has loads of fully-voiced dialogue in the game, a lot of which see him comment on his surroundings. Some of them also feature callbacks to characters and locales from past Sonic games and even comic books. While most of them are technically used, it is wildly unlikely that the player will ever hear them in-game, as they will only play if Sonic is left idle for upwards of ten minutes.

Internal Name

Sonic Frontiers is named "Sonic Rangers" internally, according to the name of the game's .acf sound archive file. Many internal files also have the word "RANGERS" in them. In addition, the title also appeared in the metadata of the game's first teaser, and in a SEGA press release on May 27th, 2021.