Sonic the Hedgehog (Mobile Decompilation)

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This page is for the decompiled port of the 2013 mobile port. For the 2010 emulated release, see Sonic the Hedgehog.

Sonic the Hedgehog (Mobile Decompilation)

Developers
Original	Sonic Team
Remaster	Christian Whitehead
Remaster	Headcannon
Windows	Rubberduckycooly
macOS (OS X)	Sappharad
Publishers
Original	Sega
	Rubberduckycooly
Engines
	Retro Engine
Release dates
Windows	January 17, 2021
macOS (OS X)	January 17, 2021
Linux	TBA
Taxonomy
Modes	Singleplayer
Pacing	Real-time
Perspectives	Scrolling, Side view
Controls	Direct control
Genres	Platform
Art styles	Cartoon, Pixel art
Series	Sonic the Hedgehog

Sonic the Hedgehog (Mobile Decompilation) is a cartoon side view platforming game in the Sonic the Hedgehog series. It is an open-source decompilation of the 2013 Retro Engine remaster of Sonic the Hedgehog originally developed by Christian Whitehead and Headcannon and published by Sega for Android and iOS devices. It has been ported to various platforms by Rubberduckycool and other contributors.

The 2013 Retro Engine remaster of Sonic the Hedgehog, as well as Sonic the Hedgehog 2, was initially developed for Android and iOS, but unlike the 2012 Retro Engine remaster of Sonic CD, it remained exclusive to mobile platforms for many years. Rubberduckycool, along with assistance from RMGRich, developed this open-source decompilation port to allow the game to be played natively on other platforms but requires the Data.rsdk file extracted from the mobile version's APK. The initial Windows release of the decompilation port was released on January 17, 2021 and a fork for macOS was also released by Sappharad. The decompilation port initially only featured a basic developer interface to navigate through the game's menus and settings, and it also introduced various issues not seen in previous releases of the game such as the bumpers in Spring Yard Zone causing players to get stuck in certain places or crashes during the credits. Many of these issues has been addressed in later releases of the decompilation port.

The decompilation port currently features the ability to toggle screen filters, configurable settings through its settings.ini file similarly to Sonic Mania, and a built-in mod loader. An official port of the 2013 Retro Engine remaster is featured Sonic Origins.

Availability

Source	DRM	Notes	Keys	OS
Developer website		macOS fork by Sappharad.

Linux version must be compiled from the source code.

Game data

Configuration file(s) location

System	Location
Windows	<path-to-game>\settings.ini

Save game data location

System	Location
Windows	<path-to-game>\SData.bin <path-to-game>\UData.bin

Video

General settings.

Graphics feature	State	Notes
Widescreen resolution		Scaled from 424x240; see Widescreen resolution.
Multi-monitor		Impossible due to various script issues.
Ultra-widescreen		Impossible due to various script issues.
4K Ultra HD		Scaled from 424x240 to desktop resolution in Fullscreen mode. Menus scale with screen width.
Field of view (FOV)
Windowed		Displayed in Windowed mode by default. Can be toggled by pressing F4. See Windowed to enable Fullscreen mode when launching the game.
Borderless fullscreen windowed		Only window borders can be disabled.
Anisotropic filtering (AF)
Anti-aliasing (AA)		Screen rotation is not anti-aliased.
Vertical sync (Vsync)		Disabled by default. See Vertical sync (Vsync).
60 FPS
120+ FPS		Game speed is tied to frame rate. Run at 60 FPS only.
High dynamic range display (HDR)

Widescreen resolution

This decompilation port is designed for a screen definition of 424x240, however, unlike Sonic Mania, only the screen width can be adjusted.

Set custom screen width in settings.ini
Open <path-to-game>\settings.ini. Adjust ScreenWidth= as needed.

Windowed

Fullscreen may not work properly on integrated graphics.

Set fullscreen on launch in settings.ini
Open <path-to-game>\settings.ini. Change FullScreen=false to FullScreen=true. If set to false, window size can be multiplied with WindowScale=. The window decorations and desktop can be hidden by using IntegerScaler

Vertical sync (Vsync)

Enabling Vsync in settings.ini
Open <path-to-game>\settings.ini. Change VSync=false to VSync=true.

Input

Controller layout.

Keyboard and mouse	State	Notes
Remapping		Key bindings must be configured manually by editing settings.ini. Keycode bindings are based on SDL Scancode Lookup codes. Developer functions such as accessing the developer menu or visualizing touchscreen elements cannot be rebound.
Mouse acceleration		Mouse is not used in-game
Mouse sensitivity
Mouse input in menus		Only main menu and some parts of the game can be interacted with the mouse.
Mouse Y-axis inversion
Controller
Controller support
Full controller support
Controller remapping		Controller mapping must be configured by editing settings.ini. Controller inputs are based on SDL Game Controller Button codes.
Controller sensitivity		Digital movement.
Controller Y-axis inversion

Controller types

XInput-compatible controllers
Xbox button prompts
Impulse Trigger vibration

PlayStation controllers

Generic/other controllers

Additional information
Controller hotplugging
Haptic feedback
Digital movement supported
Simultaneous controller+KB/M

Audio

Audio feature	State	Notes
Separate volume controls
Surround sound
Subtitles
Closed captions
Mute on focus lost		See Mute on focus lost.

Mute on focus lost

If set to true, disables the game pausing when focus is lost.

Toggle focus pause
Open <path-to-game>\settings.ini. Change DisableFocusPause=false to DisableFocusPause=true

Localizations

Language	UI	Audio	Sub	Notes
English
French
Italian
Japanese
Russian
Korean

Other information

API

Executable	32-bit	64-bit	Notes
Windows
macOS (OS X)
Linux

Middleware

No middleware information; you can edit this page to add it.

System requirements

Windows

macOS (OS X)

Linux

Windows
	Minimum
Operating system (OS)
Processor (CPU)
System memory (RAM)
Hard disk drive (HDD)