Open Surge Forum

A fun 2D retro platformer inspired by Sonic games and a game creation system

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#1 Re: General » Development builds » 2023-09-15 18:03:55

Build 20230915-dev

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  • Android: play in immersive mode

  • Implemented a managed shader system

  • Fixed the calculation of line widths leading to the rendering of misaligned texts

  • Fix: respawn existing companions when transforming the player

  • Powerup Transformation: added the ability to handle multiple transformations simultaneously

  • Optimized the level parser

  • Made improvements to the code

Important: use the Import Utility to upgrade your game. More info here.

#2 Re: General » Development builds » 2023-09-06 20:57:06

Build 20230906-dev

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  • Fix player repositioning bug of the previous dev build

Important: use the Import Utility to upgrade your game. More info here.

#3 Re: General » Development builds » 2023-09-02 21:13:31

Build 20230903-dev

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  • Revised the physics: faster speeds & more robustness. Computations are now performed in double precision.

  • Introduced the new keyframe-based animation system & custom sprite properties.

  • Introduced the ability to transform the player into a different character.

  • Introduced Player modes: cooperative, classic.

  • Introduced new powerups: Powerup Transformation, Powerup Event Trigger.

  • Updated the Default Title Card. It now uses the new keyframe-based animation system.

  • Updated the Pause Screen Animation. It now uses the new keyframe-based animation system and adjusts itself according to the size of the screen.

  • Scripting: add Animation.prop(), Animation.findTransform(), Animation.duration

  • Scripting: add, Player.mode

  • Scripting: add Player.immortal, Player.invulnerable, Player.secondary

  • Scripting: add Player.hlockTime, Player.capspeed

  • Scripting: add Player.transformInto() and function object Transform Player.

  • Options screen: bring back the resolution setting, disable the ignore gamepad setting, adjust the position of the texts according to the size of the screen.

  • Zipline: use action spots to better position the player.

  • Default Camera: make it lag behind the player with a dynamic speed cap when moving at very high speeds

  • Improvements to the code, bugfixes and other small changes.

Important: use the Import Utility to upgrade your game. More info here.

#5 Re: General » Development builds » 2023-07-25 00:48:27

Build 20230724-dev

This is a very significant performance update. I've been working on it over the past few months. Some of the core parts of the engine were rewritten - partially or completely - with performance in mind. I've changed significantly many things behind the scenes and I was able to make the engine a lot faster. There has never been a performance update as radical as this one!

Download: …


  • Breaking change: the definition of what an entity is has been changed! Previously, objects tagged "entity" were considered to be entities. Now there is an added requirement. Please read it on the docs.

    • Most existing entities already abide by the new definition. A few former entities do not. The engine will attempt to find such cases and warn you about them. If you get a warning, fix it as instructed.

  • Rewritten the entity management system. Made it faster with space partitioning based on my quadtree variant designed for the SurgeScript object tree.

  • Rewritten the brick management system. Made it faster with space partitioning based on a spatial hash with faster iterators.

    • Re-implemented the level height sampler

  • Optimized the rendering system / batching system

    • Press F10 during gameplay to see the batching stats (less batches means less draw calls and increased performance)

    • Introduced an experimental "low quality graphics mode", available at the options screen, based on a Z-buffer and with more aggressive batching

    • Experiment with a pair of FBOs used in a round-robin fashion in an attempt to prevent possible pipeline stalling in some drivers

  • Optimized collision detection. Made it a lot faster with mathemagics and with a quick partitioning scheme!

  • Optimized loading times

  • Optimized the scripting engine:

    • Optimized program lookups / function calls with self-modifying SurgeScript bytecode that recognizes opportunities for optimization

    • Optimized tag tests with faster hashes and bitsets

    • Introduced managed strings: optimized the allocation and the deallocation of strings with a pool

    • Made other changes related to temporary objects and to garbage collection

  • Optimized the rendering of fonts

  • Re-implemented the rendering of backgrounds with faster batching

    • The Waterworks 2 background is now based on a single image file for optimal batching

    • The baddies of Waterworks Zone are also on a single image file

  • Rewritten the animation system. Optimized the lookup of transitions.

  • Lots of refactoring and improvements to the internal parts of the engine

  • Scripting: updated the Profiler object

  • Scripting: added Level.findEntity(), Level.findEntities(), Player.moveBy(), Player.move(). Changed EntityEvent.

  • Introduced warnings about the future removal of the legacy scripting system / legacy items (0.2.0)

  • Removed the legacy particle system. Re-implemented particles as SurgeScript entities

  • Tweaks to the physics system, to some levels and to some scripts

  • Made changes to the Debug Mode

  • Bugfixes and other changes

Important: use the Import Utility to upgrade your game. More info here.

#6 Re: General » Development builds » 2023-04-23 23:12:02

Build 20230423-dev

Download: …


  • Made a lot of progress on the Android port

  • Mobile menu: added a new credits screen for mobile (experimental)

    • Add file credits.txt to the root folder to display your own text

  • Mobile menu: added developer mode warp trick

    • Hold the credits icon for a few seconds, then tap it

  • Mobile menu: updated the info screen

  • Created new scene: Rate the Game

  • New pause sound effects by M374LX

  • Added the Classic Quest

  • Refactored the quest system

    • Added support for implicit single-level quests

    • Added support for loading quests within quests (via .qst files)

    • Discarded obsolete fields

  • Refactor: moved the layers into the obstacle/obstaclemap (physics engine)

  • Scripting: added SurgeEngine.Platform and SurgeEngine.Platform.Android

  • Scripting: added Sensor.layer

  • Scripting: added Video.fullscreen

  • Scripting: added Level.loadAndReturn()

  • Scripting: added the SurgeTheRabbit package

  • Implemented own mouse emulation via touch input

  • Optimized the Lucky Bonus

  • Options screen: added menu item that opens the website of the engine

  • Title screen: added share & donate menu items, as in Open Surge 0.5.x

  • Title screen fix: reset the score when loading the default quest

  • Adjusted the sensitivity of the Mobile Gamepad

  • Added logic to stop all Audio Sources when unloading a level

  • Added experimental compatibility mode for loading MODs created with different versions of the engine

  • Fixed disappearing entities & collision bugs introduced in the previous dev build

  • Various fixes and improvements to the code

IMPORTANT: use the Open Surge Import Utility to upgrade your game. Do not just replace the .exe and do not move the old files into the new engine. More info at

#7 Re: General » Development builds » 2023-02-25 00:04:00

Build 230224-dev

Download: …


  • Introduce the Debug Mode, an experimental customizable mini-editor for Desktop & mobile devices written in SurgeScript

    • To access on mobile, pause the game, grab the handle at the bottom of the screen and tap on DEBUG

    • To access on Desktop, press Shift+F12 during gameplay

    • Explore scripts/debug_mode/ if you want to customize it and/or learn how it's done

  • Add the ability to change the title of the window and the size of the screen / backbuffer

    • Edit file surge.cfg at the root folder

  • Introduce video modes: fill and best-fit (these allow higher resolution graphics compared to normal gameplay)

  • Scripting changes

    • Fix player.input.simulateButton()

    • Introduce entity.lateUpdate()

    • Introduce Video.mode

    • Add Transform.scaleBy(), Transform.scale(),

  • General improvements

Note: if you're using the dev builds to develop your game, use the Open Surge Import Utility (see src/misc/goodies/). Do not just replace the .exe and do not move the old files into the new engine. More info at

#8 Re: General » Development builds » 2023-01-30 17:37:38

Build 230130-dev

Download: …


  • Introduce the Open Surge Import Utility to get MODs in sync with the latest releases of the engine

  • Add .cmd scripts for Windows users at src/misc/goodies

  • Fix: stop previous music when loading a level

#9 Re: General » Development builds » 2023-01-19 22:45:34

Build 230119-dev

Download: …

Lots of things changed behind the scenes since the last dev build.


  • Rewrite the video subsystem

    • The F11 hotkey is now used to toggle fullscreen mode

    • Dropped the Resolution setting in the options screen (the window is now resizable)

  • Performance optimizations with deferred drawing

    • Ported the 2022 Waterworks brickset to a single image using the Quick Brickset Editor in order to take advantage of deferred drawing

    • Reduced the number of images in the 2022 Waterworks background in order to take advantage of deferred drawing

  • Partial support for Android (work-in-progress)

    • Introduced a touch screen-based virtual gamepad for mobile devices

    • Introduced the mobile mode (via command-line option --mobile)

    • Introduced the new Mobile Menu (work-in-progress) with the options to take a snapshot of the game and to view technical information on mobile

  • Introduce the new Pause Menu

  • New collectible sound effect by M374LX

  • Update the tubes. Prevent possible softlock when rolling slowly at the entrance of the tubes with irregular ground

  • Reduce the speed of the little animals when underwater

  • Change the way bricks on colored layers are displayed in the editor

  • Add the command-line option --verbose to print logs to the standard output

  • Improvements to the asset system

#10 Re: General » Development builds » 2022-10-15 05:45:51

Build 221015-dev

Download: …


  • Reimplemented nanoparser with Allegro's File I/O interface and Unicode support

  • Reimplemented the asset system with physfs

  • Upgraded the Allegro library and its dependencies

#11 Re: General » How to Change jump button in open surge ? » 2022-10-04 12:11:54


Take a look at

Please ask new questions on Discord . We're currently using this forum just to share some games and assets for Open Surge.

#12 Re: General » Bug with Tails' fly ability » 2022-10-04 12:11:13


What is your engine version? Is it Open Sonic 0.1.4? Open Sonic is no longer maintained.

Please ask new questions on Discord . We're currently using this forum just to share some games and assets for Open Surge.

#13 Re: General » Resolution Error (Tiny resolution + Full Screen) » 2022-10-04 12:11:09


What is your engine version? Is it Open Sonic 0.1.4? Open Sonic is no longer maintained.

Please ask new questions on Discord . We're currently using this forum just to share some games and assets for Open Surge.

#14 Re: General » Development builds » 2022-09-01 01:16:04

Build 0.6.0-RC1 (Release Candidate 1)

Download: …


  • Add new Waterworks Zone Boss (Cody Licorish)

  • Update Polish translation (suve)

  • Create new pixel art for the title screen

  • Optimize the rendering of backgrounds

  • Update .desktop, flatpak & snap files

  • Update icons

  • Adjustments and tweaks

#15 Re: General » Development builds » 2022-08-30 04:24:19

Build 22.830-dev

Download: …


  • Add new Waterworks Zone 2, fully playable

  • New gimmick: Power Pluggy

  • New title screen music by M374LX

  • New sound effects: charge, damaged, shot by M374LX

  • Update translations: Bosnian, Dutch, Serbian (SecularSteve)

  • Improved the Waterworks brickset

  • Keep the HUD on the screen while displaying the level cleared animation

#16 Re: General » Development builds » 2022-08-21 03:51:03

Build 22.820-dev

Download: …


  • Add new Waterworks Zone 1, fully playable

  • New gimmicks: Conveyor Belts, Walk on Water

  • Fix d-pad input on Xbox controllers

  • Fix crash upon invoking object destructors when unloading/reloading a level

  • Repair support for Visual Studio via clang (svgmovement)

  • Add animated Allegro Splash Screen & SAGE 22 Splash Screen

  • New boss music by Johan Brodd

  • Update translations: German (Wuzzy), French (Stilic), Russian (Halatnikov), Italian (Nick), Esperanto (Jorge Maldonado Ventura), Spanish (reaperplayer91)

  • General improvements

#17 Re: General » Development builds » 2022-08-02 20:17:55

Build 22.802-dev

Download: …


  • New Waterworks Zone brickset

  • New Waterworks Zone backgrounds: indoors & outdoors

  • New Title Card (easier to mod)

  • New sprites: item boxes, springs, spring boosters, goal sign, goal capsule, checkpoint

  • Update poses of the Surge sprite to match the new style

  • Update the explosion sprite

  • New font: BoxyBold

  • New title screen (WIP) and new End of Demo scene

  • Scripting: introduce the concept of action spot & action offset (sprites)

  • Scripting: add Player.anchor, Player.hotSpot, Player.actionSpot, Player.actionOffset, Actor.anchor, Actor.hotSpot, Actor.actionSpot, Actor.actionOffset, Animation.actionSpot, Animation.actionOffset

  • Scripting: make Level.time read-write

  • Scripting: add property Platformer.gravityMultiplier

  • Scripting: Event Triggers can now be reactivated

  • Scripting: introduce setup object "Surge Gameplay". Make "Default Setup" and "Debug Setup" obsolete.

  • Scripting: new function objects: Translate Player, Translate Default Camera

  • Fix watercolor algorithm (use pre-multiplied alpha). Multiply RGB values by 2 to get old values.

  • Level watercolor now accepts an optional 4th parameter: alpha

  • Change the physics slightly

  • Improve macOS compatibility

  • Remove legacy Allegro 4 code

  • Bugfixes and general improvements

#18 Re: General » Development builds » 2022-06-07 16:00:17

Build 22.607-dev

Download: …


  • Improve the collision detection routine of interactive bricks: CIRCULAR, PENDULAR, FALL, FLOAT. Thanks to skemo43 for reporting an issue

#19 Re: General » Development builds » 2022-05-22 15:17:21

Build 22.522-dev

Download: …


  • Fix invalid pointer in the obstacle map when destroying a brick-like object

  • Introduce language extensions (languages/extends/ folder)

  • New Esperanto translation by Jorge Maldonado Ventura

  • Add support for compound ${EXPRESSIONS} when evaluating text

  • Evaluate $INPUT_* keys dynamically

  • Remove Korean translation

  • New regular shield sprite by SecularSteve

  • Developer mode: save the last selected level for ease of usage

  • Powerups: use a separate sprite as a collision mask

  • Increase the width of the collider of the spikes. Thanks to Halatnikov for reporting a potential issue

  • General improvements

#20 Re: Off-topic » Hello :) » 2022-05-04 13:33:27

Welcome! smile

Have you joined our DIscord server? Our discussions are taking place there.

#21 Re: Assets » Sonic Characters for Open Surge » 2022-02-13 00:23:47

Thanks for sharing!

In order to try it out, change the players entry in a .lev file as follows:

players "Sonic" "Tails" "Knuckles" "CD Sonic"

#22 Re: Off-topic » Hey! » 2021-12-13 22:06:06

We're on Discord now.

#23 Re: Off-topic » WE HAVE CLEARED 2020 (for Alexandre) » 2021-11-14 21:54:03

Proud member of the LGB-community!

LGB = Let's Go Brandon

#25 Re: General » Hello? » 2021-10-15 23:26:25


The community has moved to Discord, but we surely could have some place where users share their own games and scripts. Discord isn't the place to keep a proper record of things.

- A new website or forum just for that purpose. A gallery for the users of this engine.
- The wiki. Although interactive, we wouldn't have a feedback section that's as clear as the one we have in this forum
- Keep this forum. Kinda works, but there's a lot of old content here
- What else?

Should preferably be something managed by ourselves, not by some social media company.

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