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Stef - SGDK

@stephane-d.bsky.social
122 followers 146 following 1 posts

Permanently stuck in #16bit world and obsessed in developing on my Sega #Megadrive. Check out #SGDK, a free and open source Sega Mega Drive Development Kit 🙂

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Reposted by Stef - SGDK
Anaël seghezzi @anaelseghezzi.bsky.social · 17/07/2026
Small update on the Megadrive *rally game* ? I added sprites and did some optimization so CPU is still at 70% usage with a stable 60 fps. I'm a bit disappointed by the sprite width limit per-line. I wanted a lot more dense vegetation but it's not possible with sprites. I'll try other methods.
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Anaël seghezzi @anaelseghezzi.bsky.social · 21/05/2026
Still a lot of work to make it fun, but the physics works for at least one rival, possibly more ! The behaviour is a bit harder to code than I thought 😱 (especially with fixed point)
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Anaël seghezzi @anaelseghezzi.bsky.social · 30/04/2026
Testing hardware sprites with a point based depth-test to on/off them behind polygons. I don't think it's needed for the sides but for future obstacles ? #SGDK #BlastEm
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Anaël seghezzi @anaelseghezzi.bsky.social · 27/04/2026
Stress test on real genesis 2 hardware + Amstrad CRT. The ship is not precomputed here (it will be but I wanted to test triangles). I optimised clipping a bit more and reduced the rom size. Synced at 30fps, fully stable (~160% cpu)
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Brandon Sheffield @brandon.insertcredit.com · 30/03/2026
Frédérick Raynal, the director of the original Alone in the Dark is kickstarting a new genesis game - a remake and expansion of his old arkanoid Popcorn - and a paddle controller to go with it. www.kickstarter.com/projects/107...
kickstarter.com
POPCORN DUEL + SPINNER (SEGA Genesis / Mega Drive)
Featuring a Brand-New Dedicated Controller: The PopCorn Spinner by Frédérick Raynal
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Anaël seghezzi @anaelseghezzi.bsky.social · 27/11/2025
Chunky, but 60 fps 3d possible with colors and transparency on bare metal Megadrive #SGDK #BlastEm
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Anaël seghezzi @anaelseghezzi.bsky.social · 18/11/2025
Background + sprite animation (the ship is now pre-rendered) and... tunnels ! I think I can add more gameplay elements and stay at 30fps, there is hope, the megadrive is a beast :o
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Anaël seghezzi @anaelseghezzi.bsky.social · 03/11/2025
Jumping! I want the driving to feel smooth and arcadey like a Sega Rally. I was never a big fan of Wipeout's physics, but I love the graphics obviously :)
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Anaël seghezzi @anaelseghezzi.bsky.social · 18/10/2025
Side quest in texture land... DMA is on it's knee and interrupts are eating a good chunk of CPU on #SegaMegadrive #SGDK #BlastEm
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Anaël seghezzi @anaelseghezzi.bsky.social · 23/10/2025
I reworked the camera, improved clipping and rewrote the physics with acceleration and drift, the feel is better now
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Anaël seghezzi @anaelseghezzi.bsky.social · 08/10/2025
So mayyybe it's possible to render in 4 colors, it takes 20% more cpu but two palettes of 16 colors are then free for sprites and background #SGDK #SegaMegadrive
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Anaël seghezzi @anaelseghezzi.bsky.social · 25/09/2025
Only 2 colors, but finally some stable 30fps 3d without line-doubling (256x128 or 320x128 pixels) on stock Sega Megadrive :) The bottleneck is the height of the polygons. I exhausted all my ideas so I don't think I can do faster at this resolution.
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Space… bruce! @spacebruce.bsky.social · 24/08/2025
Improved this more, there were a few single frame hitches that I've squashed out
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Brandon Sheffield @brandon.insertcredit.com · 31/05/2025
The project came about because one of the devs was messing with @stephane-d.bsky.social's SGDK and they decided to give them space to make it. Though it was announced April 1, it's a proper game and comes with a downloadable emulator executable! I appreciate how seriously the manual treats the game.
The first page spread of the manual is shown. You see the Giants Software logo and copyright on the left, and on the right it has detailed instructions for cartridge insertion and making sure you have the console off when you put it in, and have your cables connected, and all that kind of stuff. Feels very much what they would have said if it came out in the 90s.
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古代祐三 (Yuzo Koshiro) @yuzokoshiro.bsky.social · 04/05/2025
After years of hard work, our retro-inspired shooter Earthion finally has its own home online. Dive into the world, watch the new trailer, and hear a track made entirely with the Megadrive’s YM2612 sound chip. Now viewable in English and Portuguese: earthiongame.com
earthiongame.com
Earthion - Earthion
Return to the genesis of 16-bit gaming with Ancient's brand new shoot 'em up, Earthion!
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dale coop ☕️ @dalecoop.bsky.social · 07/04/2025
Super excited to share that Backwards Quest won Best Game at the NESmaker Byte-Off Awards at MGC! Big thanks to the awesome @nesmaker.bsky.social team, and congrats to my partners-in-crime Artix, Fernando, and Jordan! ➡️ theretroverse.com/product/back... #NES #homebrew #nesdev #indiegames #ファミコン
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Stef - SGDK @stephane-d.bsky.social · 02/04/2025
www.patreon.com/posts/sgdk-2...
patreon.com
SGDK 2.10 released ! | Stephane Dallongeville
Get more from Stephane Dallongeville on Patreon
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Greg Gallardo @greggallardo.bsky.social · 27/03/2025
Trying raycasting again youtu.be/viGHLhuKa-E
youtu.be
Raycasting in SGDK Again
YouTube video by Greg Gallardo
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SEGA-16 @sega-16.bsky.social · 26/03/2025
GGS Studio Creation and Broke Studios launched a franchise with The Cursed Knight, a wonderful mix of genres that delivers a solid dose of old school gaming. It has charm, great presentation, and that wonderfully frustrating gameplay we all love. www.sega-16.com/2025/03/curs...
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Kulor Research Labs Inc. @kulor.bsky.social · 26/03/2025
more Sega Genesis stuff, here's the first witchy battle theme for @nosebecc.bsky.social's (NSFW!!!) game, featuring what would become one of the game's other leitmotifs
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David “Mecha Zone” White @mechazone.bsky.social · 22/02/2025
I added some new tile types to Gilgamech... - Death, Damage, and Conveyor L/R tiles Here's a screenshot of my test level. You can also check out a video of these in action by joining my free Patreon dev diary. www.patreon.com/posts/welcom... #SGDK #Gilgamech #GameDev #IndieDev
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David “Mecha Zone” White @mechazone.bsky.social · 22/02/2025
One of the many reasons #SGDK is such a valuable Genesis game dev tool is its automation of creating multi-sprite objects for characters. I recently got a new version of Blastem that lets me see exactly how sprites are structured and it's very interesting 🤯 #GameDev #IndieDev #Gilgamech
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Two Black Cats @twoblackcats.jp · 06/03/2025
Now that the Square Brothers Megadrive port is finished and tested, we started a new game! We wanted to try something with constant palette swapping to try that engine module! ʕ •ᴥ• ʔ #sgdk #megadrive #mdengine
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Hunter @bearmade.bsky.social · 08/03/2025
Whatever happened to secret codes and sound tests? #screenshotsaturday #sgdk #segagenesis #megadrive #gamedev
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Anaël seghezzi @anaelseghezzi.bsky.social · 28/11/2024
Repost of my 60 fps raycaster with texture on the original Sega Megadrive/Genesis. Find the rom here -> anael.maratis3d.com/mega/ #SGDK
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Anaël seghezzi @anaelseghezzi.bsky.social · 28/11/2024
Also 60 fps, custom tri/quads and wireframe 3d on Sega Megadrive/Genesis :p
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Anaël seghezzi @anaelseghezzi.bsky.social · 03/02/2025
The simple power of k-means clustering for lossy compression : 1120 tiles are needed on the left (uncompressed), 512 tiles on the right. On Sega Megadrive with #SGDK
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Mollie L Patterson @mollipen.bsky.social · 04/11/2024
Unbelievably, 35 years after its US launch, there are enough new games coming for the Sega Genesis that it can be hard to keep track. Now, you don't have to! I've launched the Mega Drive Tracker, a site that catalogs all the new physical releases coming to Sega's 16-bit console. md.restartmag.com
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Plutiedev @plutiedev.com · 17/12/2024
I heard rumors of a service called X-Mail coming soon, I wonder if this is it?
XBand menu with four icons: X-Mail, Bandwidth, XBand News, Return.
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Genesis 8:14 @genesis814.bsky.social · 20/10/2024
Master Pigsy shares with us his progress on Castlevania Symphony of the Night for Sega Mega Drive. youtu.be/X98SNoqGaUM #sega #megadrive #segagenesis #castlevania #sotn #indiedev #retrodev #indiegame #retrogame #sgdk #homebrew
youtu.be
Mega Drive Demo #77 - Castlevania: Symphony of the Night (Entrance) by Pigsy
YouTube video by Genesis 8:14
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David “Mecha Zone” White @mechazone.bsky.social · 28/11/2024
My hobby is making a new Sega Genesis aka Mega Drive game. Today I designed and implemented a turret enemy. Here is my plan for the trigger boxes. I had to make them a little larger to get it t working just right. See more on my Patreon #gamedev #segagenesis #SGDK #megadrive #gilgamech
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Davila Games @davilagames.bsky.social · 30/11/2024
True Galactic Mission WIP#1 (Mega Drive / Sega Genesis) youtu.be/vc8YDqBvnd8 #DavilaGames #TrueGalacticMission #MegaDrive #SegaGenesis #SGDK #RetroGaming #RetroGame #RetroGames #ShootEmUp #SHMUP #Sega #TecToy #GameDev #RetroDev
youtu.be
True Galactic Mission WIP#1 (Mega Drive / Sega Genesis)
YouTube video by Davila Games
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Lunatic Fighters @lunaticfighters.bsky.social · 29/11/2024
Lunatic Fighters WIP#2 (Mega Drive / Sega Genesis) youtu.be/_QGxbhXUQfA #DavilaGames #SGDK #MegaDrive #SegaGenesis #GameDev #GameDevelopment #LunaticFighters #LF #RetroGame #RetroGames #RetroGaming #RetroGameDev #GameDeveloper #Game #Games #RetroDev #FightingGame #FightingGames
youtu.be
Lunatic Fighters WIP#2 (Mega Drive / Sega Genesis)
YouTube video by Davila Games
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