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SUDDEN・DESU

@sudden-desu.net
2.2K followers 89 following 599 posts

レトロゲームを逆アセンブルして調査。メガCD開発キットMEGADEVを作成した。 Retro game disassemblies/research and Megadev, a Mega CD SDK. Occasional posts about life in Japan. 🔗 sudden-desu.net 🎉 patreon.com/SUDDENDESU

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SUDDEN・DESU @sudden-desu.net · 18h
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SUDDEN・DESU @sudden-desu.net · 02/10/2026
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SUDDEN・DESU @sudden-desu.net · 02/10/2026
Not exactly easy to restore.
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SUDDEN・DESU @sudden-desu.net · 02/10/2026
And what if I told you there was a Indian girl character planned for DOA2? And that (some of) her data is still present in the older DC prototype dumps?
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SUDDEN・DESU @sudden-desu.net · 02/10/2026
Reminder that Shenmue only exists because of Steven Spielberg: "Spielberg toured Sega when he came to Japan on a film promotion tour, I think. He had a game company too, GameWorks. President Nakayama led, and we went round the development floor together." (1/3)
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SUDDEN・DESU @sudden-desu.net · 22/09/2026
MAME really is the goddamn best emulator ever made.
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SUDDEN・DESU @sudden-desu.net · 19/09/2026
Man, prototype Pai was cute with the blush marks and smile. Final version included for reference.
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SUDDEN・DESU @sudden-desu.net · 19/09/2026
Mentaiko spaghetti for lunch, probably my favorite quick, “dump it all together and eat” food
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SUDDEN・DESU @sudden-desu.net · 19/09/2026
Tired: DAY-TOOO-NAAAAAAAAA Wired: GAAAaaaaaame OOO-BAaaaaaa........
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SUDDEN・DESU @sudden-desu.net · 18/09/2026
Really wish they had actually used those colorful, fun typefaces/logos in Virtua Racing...
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SUDDEN・DESU @sudden-desu.net · 18/09/2026
Was going through my many binders of Sega paperwork for more Virtua Fighter research (shocking.), when I saw this... Hey wait, 1993 is way too early for Sonic the Fighters... Ahh, it's actually an earlier name for SegaSonic Cosmo Fighter. (oh and there's Virtua Fighters at the top.)
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SUDDEN・DESU @sudden-desu.net · 17/09/2026
3人合わせてパ○ュームです!
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SUDDEN・DESU @sudden-desu.net · 17/09/2026
Part of the Virtua Fighter research, believe it or not...
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SUDDEN・DESU @sudden-desu.net · 17/09/2026
in case you forgot where the cool kids hang out
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SUDDEN・DESU @sudden-desu.net · 17/09/2026
Hmmmm.....
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SUDDEN・DESU @sudden-desu.net · 17/09/2026
Can you just imagine seeing Virtua Formula on the floor at AOU 1993? How mindblowing that must have been? What a setup. What a force Sega used to be...
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SUDDEN・DESU @sudden-desu.net · 16/09/2026
たしかにメガ○ライブだったらマウス代わりにヘッジホッグを使うのは当然だよ。 (ふせ字にしなくていいってば…)
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SUDDEN・DESU @sudden-desu.net · 16/09/2026
Wow, lots of mail arriving today... - Kat's Run - Need the manual for research on an upcoming arctle - VF Maniax... for an upcoming article. - Yume Kōjō 87 Zenkiroku, with its high quality images of the early Sega Mach Vision, for Sega Retro
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SUDDEN・DESU @sudden-desu.net · 16/09/2026
Oh man, the best thing about preorders is completely forgetting about them, and then getting a surprise in the mail months later!
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SUDDEN・DESU @sudden-desu.net · 15/09/2026
The background and sprite art in Sailor Moon arcade is really gorgeous...
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SUDDEN・DESU @sudden-desu.net · 15/09/2026
The color behind the TIME icon in Virtua Fighter changes? And has a meaning? Yes and yes. :)
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SUDDEN・DESU @sudden-desu.net · 11/09/2026
I wasn't sure which article I wanted to finish and post next, but oh man... I think I've decided. It's gonna be another landmark Sega game. Maybe you've heard of it... :)
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SUDDEN・DESU @sudden-desu.net · 11/09/2026
Forget about Sonic, forget about Flicky... Let's bring back Mr. Nastyface to his proper place of glory in Rad Mobile!
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SUDDEN・DESU @sudden-desu.net · 07/09/2026
Do you remember IRC? Do you have an aversion to Discord's epic gamer quirk chungus sensibilities? Do you like retro Japanese pop culture, with a focus on old games? Consider yourself old-school otaku? Join #neokobe on irc.synirc.net! Come join and idle with us.
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SUDDEN・DESU @sudden-desu.net · 06/09/2026
Mail’s here. Not a game card for once, but a telephone card! And come back on Monday for a new article - pic related ;)
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SUDDEN・DESU @sudden-desu.net · 05/09/2026
Something is... different here in Sailor Moon arcade. What is it... hmmm....
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SUDDEN・DESU @sudden-desu.net · 02/09/2026
Tired: Rad Mobile is the first appearance of Sonic the Hedgehog in a video game as a rear-view mirror ornament. Wired: The game also has a hidden Flicky ornament, hidden behind an input code.
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SUDDEN・DESU @sudden-desu.net · 02/09/2026
"We love DRUGS. Let's enjoy your Trip!!" One of the more amusing finds lately is some remnants of what might be a Sega System 32 sample project, present in Rad Mobile/Rally and Hard Dunk., with one string in particular being rather... conspicuous.
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SUDDEN・DESU @sudden-desu.net · 01/09/2026
Anyone more familiar with Astra Superstars (ST-V arcade version) then me: I think we found an unused training mode stage. Can anyone confirm if this stage (the background) is used somewhere?
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SUDDEN・DESU @sudden-desu.net · 01/09/2026
Hidden dev menu in Sōkyūguren-tai (Terra Diver), locked behind a simple input code? Sure, why not.
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SUDDEN・DESU @sudden-desu.net · 31/08/2026
Waku Waku 7 background art appreciation thread.
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SUDDEN・DESU @sudden-desu.net · 30/08/2026
Though I did take a couple shots on the GOLGO 13 machine…
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SUDDEN・DESU @sudden-desu.net · 30/08/2026
Pop’n machine on free play at the kids amusement space… too bad I can’t play because I have to be a responsible parent :V
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SUDDEN・DESU @sudden-desu.net · 29/08/2026
Sounds like I should finally write an article about the debug tools leftover in Armadillo Racing...
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SUDDEN・DESU @sudden-desu.net · 28/08/2026
Good morning to the devs of OutRunners, who had to hide their names behind the Konami code in the attract mode because they didn't get a staff roll at the end of the game.
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SUDDEN・DESU @sudden-desu.net · 28/08/2026
A disconnected dev menu in Great Mahou Daisakuen / Dimahoo. Neat.
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SUDDEN・DESU @sudden-desu.net · 27/08/2026
That's kind of neat. In the Dead or Alive (original Model 2 hardware) data, you can see the sampled wireframes they used as reference for painting on textures.
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SUDDEN・DESU @sudden-desu.net · 27/08/2026
Sega really had a thing in the late 80s where they wanted everything to be a card…
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SUDDEN・DESU @sudden-desu.net · 26/05/2026
Awwww yeeeeeh
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SUDDEN・DESU @sudden-desu.net · 19/05/2026
I accidentally bid on/won parts for a FamicomBox. It’s basically going right into the trash, but there is an on board ROM that I wonder if it’s worth the hassle to see if it an undumped version (probably not)…
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SUDDEN・DESU @sudden-desu.net · 04/05/2026
One of the debug tools in Top Ranking Stars has weaving written as "weebing" which got a hearty chuckle out of me. Next Patreon article will take a brief look at the stuff hidden away in the game!
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SUDDEN・DESU @sudden-desu.net · 22/04/2026
Oh I am *fully* embracing life as a middle aged dad…
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SUDDEN・DESU @sudden-desu.net · 03/04/2026
Cool old NEC sign spotted recently in Kyoto
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SUDDEN・DESU @sudden-desu.net · 27/03/2026
It’s kind of infuriating that Nintendo soldered (?) the SRAM battery to their sufami test boards. It’s going to leak someday, but removing it “damages” the board. Sega did it right with battery sockets.
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SUDDEN・DESU @sudden-desu.net · 25/03/2026
Completely forgot I pre-ordered this! Nice surprise this morning.
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SUDDEN・DESU @sudden-desu.net · 23/03/2026
Let’s gooooooooo
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SUDDEN・DESU @sudden-desu.net · 22/03/2026
初桜だ!
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SUDDEN・DESU @sudden-desu.net · 22/03/2026
I make Kenmin biifun five packs at a time because the whole family loves it. Going to make a gorgeous seafood and pork mix tonight!
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SUDDEN・DESU @sudden-desu.net · 16/03/2026
Oh hey an old DVD fell out of a bag at the garbage collection point. Let’s see….. oh.
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SUDDEN・DESU @sudden-desu.net · 14/03/2026
It's a been a long time coming... MEGADEV, a development kit for the Sega Mega CD, version 1.0 is released! ──────────────────── 🔗https://github.com/drojaazu/megadev ────────────────────
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