Credits
- Code — NoRecess
- Level design — NoRecess
- Graphics — Ced
- Design — TotO
- Audio conversion and player — Targhan
- Instruction manual — TotO, Slype
Credits as listed on Pouet, plus the instruction manual.
Sonic the Hedgehog on the Amstrad console
The project began in 2018 and took seven years. In October 2025 it was finished, and Sonic GX went out as a cartridge for the Amstrad GX-4000 and the Plus machines, with an instruction manual and a technical presentation alongside it.
It is worth saying plainly what a small group did here. Cédric “CeD” Quetier converted the graphics, Julien “Targhan” Névo the audio, Richard “TotO” Gatineau handled design and support, “Slype” wrote the instruction manual, and Arnaud “norecess464” Storq — me — wrote the code and designed the levels. Seven years of interest, support and encouragement from people watching kept it moving; that is not a courtesy, it is why it exists.
You can finish the game in about ten minutes if you speedrun it. Scoring well is another matter: the Chaos Emeralds are hidden across the levels, and finding them all is the real game.
Screenshots
Seven screens in the order the game shows them, from the Condense title to the first special stage. Any one of them opens full size.
The manual and the technical presentation
Both documents that shipped in the cartridge archive are here to read: the instruction manual in 20 pages, and the technical presentation in 100, which sets out how the game was fitted onto the machine. Any page opens full size; the originals can be downloaded whole — the manual and the technical presentation.
Instruction manual
Technical presentation
What was said about it on YouTube
Thirty videos about Sonic GX, in English, French, Italian, Polish and Greek: reviews, first looks, longplays and captures from real hardware. My own favourites come first, then the rest by how many have watched them. Each thumbnail opens the video on YouTube.
🕹️ AMSTRAD Sonic The Hedgehog is INCREDIBLE! 🦔 [AMSTRAD GX4000] "Sonic GX" - Longplay + Analysis! ⭐️
Sonic GX for the Amstrad GX4000 - BDIWORH LIVE! - 7pm BST 6th Jun '26
Sonic the Hedgehog on GX4000! And the Best GX Homebrew Games
NRG: 5-10 Minutes of Gameplay - Sonic The Hedgehog (Sonic GX) [Amstrad GX4000]
ON L’A TROUVÉ : SONIC sur GX-4000… et c’est RÉEL 😱🔥
[Amstrad GX4000] Sonic GX - Longplay
SOMEONE IS MAKING A SONIC GAME FOR IT!!?? - A NEW AMSTRAD GX-4000 Game!
Master System VS Amstrad GX4000 - Sonic the Hedgehog Battle #mastersystem #amstrad #sonicthehedghog
Amstrad GX-4000 -=Sonic GX=-
ChinnyVision - Ep 570 - Sonic The Hedgehog - Amstrad GX4000
Sonic GX4000. Review d'un miracle du homebrew. C'est juste dingue 🤩
Retro Special - Sonic GX Preview & Comparison.
Sonic GX - GX4000 - Short gameplay - Captured from REAL GX4000
[AMSTRAD CPC] ⚡️ AMSTREAM ⭐️ "Sonic GX" SONIC THE HEDGEHOG on the Amstrad GX4000!!🦔 + Game Requests!
Sonic on the Amstrad GX4000? They REALLY did it! (SONIC GX Discovery)
Amstrad GX4000 - Sonic GX Longplay&μπλα μπλα
Sonic GX - Amstrad GX4000 & Amstrad Plus.
Sonic the Hedgehog GX – Pushing the GX4000 to Its Limits
Sonic The Hedgehog GX Review for the Amstrad Plus, GX4000 by John Gage
AMSTRAD GX 4000 += SONIC THE HEDGEHOG GX =+ NEW GAME 2025
Sonic GX - Amstrad GX4000
SONIC GX (Amstrad GX4000)
Sonic the Hedgehog GX (Amstrad GX4000) – Full Review & Playthrough | The Blue Blur on 8-Bit!
Sonic GX (2025) - Amstrad GX-4000
Sonic sur GX4000
🌀AMSTRAD - SONIC GX4000 - CHEAT MODE 😚
Sonic GX on real Amstrad GX4000 with CRT, 1st Level and Bonus Stage
Sonic GX - HOT NEWS as Sonic the Hedgehog has arrived on the Amstrad GX4000 and Amstrad Plus!
Sonic the Hedgehog GX - Amstrad GX4000
Sonic the Hedgehog - Amstrad GX4000
Development previews
Seven years is a long time to work in silence, so the game was shown as it came along. These three recordings are what was published while it was still being built — the dates are when each was presented, not when the game was finished.
Watched in order, they are the game arriving: a first look, then the Special Stage, then a version close to what shipped.
Comments from Pouet
The comments below were left on Pouet.net about Sonic GX. They are quoted as they were written. Copied from that page on 17 August 2026.
Réalité impressive Work. Bravo norecess, Ced and Targhan for this piece of masterclass on gx4000. Chapeau bas l’équipe 🙏
— cmpcpc, 2025-11-01 · rulez
I haven’t seen this version in real yet. However, I’ve been following the development of the GX-4000 on your YouTube channel. What can I say? The screenshots and the technical aspects are simply insane!
— MrVainSCL, 2025-11-01 · rulez
OMG ! Congratulations to all the team ! Arnaud, Ced, Targhan, Nice to see you again ay bnd coding party 5.
— ast, 2025-11-01 · rulez
Without a doubt, a new milestone in the history of GX4000 Games - Congratulations to the team!
— siko, 2025-11-01 · rulez
This made my weekend. And the next.
— Gryzor, 2025-11-01 · rulez
Finally it’s out! I tested only little bit on emulator and the controls seemed floaty but maybe it’s the emulator which also stutters for other reasons now. I will very soon try it on my GX4000.
— Optimus, 2025-11-01 · rulez
Congratulations on this achievement! The work done on this game is colossal! Well done to the entire team for this exceptional work. This game undoubtedly marks a new milestone in game production on the CPC.
— Nicky1DBT, 2025-11-01 · rulez
Feels amazing ! Kudos to the team
— Made, 2025-11-01 · rulez
Haven’t tried it yet, but thumbs up for showing the GX some love
— britelite, 2025-11-01 · rulez
Congratulations ! Great work !
— Anaghir, 2025-11-01 · rulez
Show all 68 commentsShow fewer comments
Amazing work Arnaud, Ced & Targhan, it’s great to see this project released after so much efforts you put in it !
— atc, 2025-11-01
Not played yet, just watched others doing. Definitly at top quality game on Amstrad Plus
— krusty, 2025-11-01 · rulez
Awesome! Gameplay - YT
— saberman, 2025-11-01 · rulez
someones already selling it on ebay incase you were not aware https://www.ebay.co.uk/itm/267455051448?_skw=amstrad+crt&itmmeta=01K8ZHGMRNZB4W434Z3QZ8S4GW&hash=item3e459036b8:g:eO0AAeSwWwFpBbbk&itmprp=enc%3AAQAKAAAAwFkggFvd1GGDu0w3yXCmi1fXmSOjz%2BMGBZvaCtnYGdGFHLb3XVbtdL5QQ3lNE8GnBqfYlA6gkJUuc9gNZrSsnGJblPiVfy0xuaUGX5NI6Vybh1Q5tksTxEObuy3Fzg2%2FiWWs2czyOeBcPji3gZppB5evaU%2F5AzYVOdtve1BKa4%2FX6WiQNLr%2BNWcwXuxMxbqJZ7aRP5pppxDdbSjmC7yiUSFkDeqXbCgCnrzdejC7d3WQUMGElFJeAOjaqzUQT4yXBw%3D%3D%7Ctkp%3ABk9SR9bMwvHHZg
— YBSoftware, 2025-11-01
Great work, looks amazing!
— micdune, 2025-11-01 · rulez
Wow! Looks really smooth. Sonic is kind of the benchmark when it comes to 2d platform engines with its fast scrolling and angular platforms
— rloaderro, 2025-11-01 · rulez
Great job! The graphics, the music, the gameplay, and all of it in overscan. Incredible.
— Rity, 2025-11-01 · rulez
Amazing work Arnaud, Ced & Targhan, it’s great to see this project released after so much efforts you put into it !
— atc, 2025-11-01 · rulez
Amazing work! Congratulations to the whole team. I’ve never played Sonic, but I’d say it feels just like the SEGA console version. Still, I have a nephew who’s a huge Sonic fan, and I’m going to let him play it to see what he thinks. :)
— Rhino, 2025-11-01 · rulez
Incredible work!!! Well done Arnaud and the team.
— gougoutt, 2025-11-01 · rulez
Huge work… very smooth. Really nice.
— Beb, 2025-11-01 · rulez
Ha! Marvelous! Great job!
— rexbeng/PA, 2025-11-01 · rulez
Hyper impressionnant pour cette production hors normes à tous points de vue. Génial et indispensable !
— BoubaDBT, 2025-11-01 · rulez
Une dinguerie :)
— Barjack, 2025-11-01 · rulez
Congratulations to everyone involved! This is huuuuge work! As Rhino said for his nephew, my son also turns to be a Sonic fan (for an unknown reason), so assume you guys have a new 4 yo fan :)
— voxy, 2025-11-01 · rulez
Congratulations to everyone involved! This is huuuuge work! As Rhino said for his nephew, my son also turns to be a Sonic fan (for an unknown reason), so assume you guys have a new 4 yo fan :)
— voxy, 2025-11-01
Work of art! Amazing production values!
— JonnyManiac, 2025-11-02 · rulez
Just finished it (with cheat mode ^^). Great game. Great work. Congratz.
— Tronic_GPA, 2025-11-02 · rulez
Just to clarify I was trying to let you know someone was already trying to sell your work on ebay. I am a CPC creator myself and know how frustrating it is when people steal your work to make profit for themselves. Bruno Kulkan and Eric Titan can confirm my identity. I am Phil Sandiford (Yellowbelly) i am creator of Bugs Quest and Xyphoes nightmare. i put the link in so you could possibly take action against them. i am not the ebay seller. sorry for any confusion was trying to help protect your work.
— YBSoftware, 2025-11-02
What an incredible amount of hours and collective effort to make this happen ?! The knowledge gathered + created by NoRecess about the performances of the GX4000 should probably end up in a book. Bravo, it’s obvious how much this project is the result of several YEARS of challenging the GX4000 architecture
— fra, 2025-11-02 · rulez
Wow
— leGend, 2025-11-02 · rulez
Damn! Excellent work.
— ham, 2025-11-02 · rulez
Top quality in every areas! Congratulations to the whole team for this impressive work!
— toms, 2025-11-02 · rulez
respect !
— med, 2025-11-02 · rulez
Kind of game I didn’t expected on the GX4000 hardware, due to the sprite limitations. Really nice job, it seems very close to other commercial releases (I have to play the Master System version again to check for differences). No Recess for president ! Who can produce new batches of C4CPC or similar card to play this gem on a real CPC ?
— tometjerry, 2025-11-02 · rulez
excellent work i hope to be as good as this one day in the future, although i am getting old
— YBSoftware, 2025-11-02 · rulez
Congratulation to all the team for this release. Perfect GFX, Really nice code, wonderful musics ! As said Tom & Jerry, hope that a new batch of C4CPC will arrive soon.
— Candy, 2025-11-02 · rulez
Well done NoRecess, Ced, Targhan, Toto! the wait was worth it
— roudoudou, 2025-11-02 · rulez
That’s so sick
— MuffinHop, 2025-11-02 · rulez
This is insane, congrats!
— Soundy, 2025-11-02 · rulez
Here in Argentina, Amstrad platforms were never popular. In fact, we produced an official PAL-N version of the Commodore 64, and the MSX was a distant second. However, in terms of consoles, the Mega Drive was a massive success here, to the point that unlicensed clones are still manufactured locally today, and consequently, Sonic is quite popular in these parts. And that’s how I discovered this port for the Amstrad Plus. I was completely unfamiliar with this hardware, but I followed the development. It looks not only incredible, but the sheer number of effects without any slowdown is remarkable. My applause to whoever made this, and I hope it opens the door to porting it to other systems of the era.
— JasonBlueX, 2025-11-03
Truly amazing game, first time a game show the true amstrad + potential !.
— soviet9922, 2025-11-03
huge stOff
— SuKranPoudR, 2025-11-03 · rulez
Impressive production, took quite some time but it was worth it. Congratz to all the talented ones involved, especially NoRecess.
— MacDeath, 2025-11-03 · rulez
Simply mind-blowing. Congrats to the whole team! :clap: :clap: :clap:
— Hwikaa, 2025-11-03 · rulez
Impressive work, very polished and fun to play ! And the whole thing in overscan, this is wizardry. Thanks also for sharing the presentation, I had not noticed the optimizations on the sprite updates, really interesting read. Bravo !
— kezax, 2025-11-03 · rulez
The most polished game ever seen on the Plus machine; congrats to the whole team !
— Kris, 2025-11-03 · rulez
Amazing work! I played it a lot on Megadrive when I was a child, and I had just as much fun testing it at Benediction Coding Party #5… Everything is excellent: code, graphics, music. Well done to the whole team!
— Hicks, 2025-11-03 · rulez
❤️
— spritus, 2025-11-04 · rulez
just great
— Blast!, 2025-11-04 · rulez
Thanks Norecess, Ted, TotO for fans like me to play Sonic on CPC. Great release and I’ll do speed run ;).
— sid_Impact, 2025-11-04 · rulez
geil
— SiR, 2025-11-05 · rulez
Succeeding in making us forget that we are playing on an Amstrad PLUS is imho a sign of great success for a game or demo. No doubt that this game will go down in history! Well done again to the whole team for seeing this project through to completion, after 7 years! Thank you also for the official release and presentation at BND#5.
— EliotBenediction, 2025-11-06 · rulez
Great!
— xeron, 2025-11-08 · rulez
so cool
— guardian ٩๏̯͡๏۶, 2025-11-09 · rulez
very very very chic very very very slick very very very sonik
— Gʀɪʍʍy, 2025-11-09 · rulez
WOW & AWESOME! I showed it on real Hardware this weekend @ Comparade
— RufUsul, 2025-11-09 · rulez
Great work. Too bad Sonic isn’t great hides
— serp, 2025-11-11 · rulez
Insane
— Fell, 2025-11-11 · rulez
so sweet!
— Ramon B5, 2025-11-14 · rulez
Excellent!
— keops, 2025-11-14 · rulez
gotta go fast
— 🎀𝓀𝒶𝓃𝑒𝑒𝓁🎀, 2025-11-17 · rulez
Amazing work!! Well done!! Would it work on Amstrad CPC6128 Plus as well?
— Sir_Lucas, 2025-11-18 · rulez
Great work! It’s incredible what they managed to get out of the system here. Our German-language review can be found at 04:46:23. English subtitles are also available. Subscription to our YouTube and Twitch channel is welcome. 🙂 https://www.youtube.com/watch?v=i21IhfitJ6w&t=17183s
— RP_PARALAX, 2025-11-24 · rulez
I cannot believe it. Never heard of that console before as well.
— vitalkanev, 2025-11-27 · rulez
Quote:Amazing work!! Well done!! Would it work on Amstrad CPC6128 Plus as well? in the manual: “This game is designed to run on the Amstrad GX-4000 console and the Amstrad 464/6128 Plus computers.”
— RufUsul, 2025-11-27
Do you think I’m made of CDC’s!
— CiH, 2025-11-27 · rulez
Very impressive showcase for the Amstrad GX4000. Even more impressive is that it’s a full game. Making a cool tech demo with limited content is no small feat, but making a fully polished game takes 20x as much time.
— exocet, 2025-11-29 · rulez