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Proto Challenge @protochallenge.bsky.social · 22/08/2026

This is Johnny All-Star, an unreleased compilation of the Johnny series released on the 3DS eShop by UFO Interactive Games. This was likely intended for a retail release. Thank you to @akfamilyhome.com for dumping this and sending it to us!

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Proto Challenge @protochallenge.bsky.social · 17/08/2026

Sorry, it looks like you'll probably need to DM me first. It's not giving me the option to DM you.

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Proto Challenge @protochallenge.bsky.social · 17/08/2026

Hello! May I please DM you? I've got a few questions about this.

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Proto Challenge @protochallenge.bsky.social · 14/08/2026

Sorry for the wait! The Internet Archive download is now live.

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Proto Challenge @protochallenge.bsky.social · 14/08/2026

This was used in a factory machine called the Gyro Station (like the one in this picture), which would plug into another 3DS to make sure its gyroscope was functioning correctly before that 3DS would leave the factory. The Multi Loader app on the NAND would load the test program from an SD card.

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Proto Challenge @protochallenge.bsky.social · 14/08/2026

Hello! Today, we have for you a 3DS factory tool called CTR Multi Loader, which would load firmware files from an SD card. This was dumped from a 3DS X2A prototype unit, and this build of the tool is dated June 2, 2010. (More details in 🧵)

PCB photo showing the main system on a chip

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Proto Challenge @protochallenge.bsky.social · 09/05/2026

Today, we bring you a prototype of Bugs Bunny Rabbit Rampage for the SNES with unknown differences compared to the final version. Thank you to PrimalConcreteSledge for dumping this and sending it to us for release!

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Reposted by Proto Challenge

The Cutting Room Floor @tcrf.net · 09/04/2026

Hey folks! We have an anonymous release today of a very early Punch-Out prototype! There's a lot to see in it (but not hear); check out the @gamehistoryorg.bsky.social video here! www.youtube.com/watch?v=3T5A...

youtube.com

This Punch-Out!! Prototype is Unlike Anything We've Seen Before

YouTube video by The Video Game History Foundation

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Proto Challenge @protochallenge.bsky.social · 09/04/2026

We've released a v3.1 update to our 3DS EmuNAND kit to address some technical issues. If you've had technical issues when using the kit, please try running this new update.

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Reposted by Proto Challenge

AK @akfamilyhome.com · 05/04/2026

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Proto Challenge @protochallenge.bsky.social · 04/04/2026

Also, please note that the EmuNAND only works on real hardware. There is currently no way to play prototype titles on an emulator.

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Proto Challenge @protochallenge.bsky.social · 04/04/2026

The full release with NAND dumps is now available here: archive.org/details/more... Please use the EmuNAND Setup Kit linked earlier in the thread if you want to play these titles. This link is just for archival purposes.

archive.org

More Nintendo 3DS Prototypes (2010) : Free Download, Borrow, and Streaming : Internet Archive

Proto Challenge presents...20 prototypes of 3DS titles dumped from seven prototype system NANDs! Most of these are early versions of built-in system...

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Proto Challenge @protochallenge.bsky.social · 04/04/2026

Proto Challenge presents... A lot of Nintendo 3DS system software prototypes + a very early prototype of Kid Icarus Uprising! This release has been a long time coming, and we're happy to finally have it all working on retail hardware for anyone to try. 🧵

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Proto Challenge @protochallenge.bsky.social · 04/04/2026

Friendly reminder: this is about 12 hours away. 👀

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Reposted by Proto Challenge

AK @akfamilyhome.com · 02/04/2026

In partnership with @protochallenge.bsky.social, I'm happy to showcase some new 3DS system software prototypes in a livestream on April 4th, 11:45 AM Eastern / 8:45 AM Pacific. Joining as co-commentator will be @jamesmoney.bsky.social! Hope to see you there! youtube.com/live/MDdX0b-...

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Proto Challenge @protochallenge.bsky.social · 01/04/2026

Thanks for 100 followers! We'll have an exciting announcement coming tomorrow. 😱

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Proto Challenge @protochallenge.bsky.social · 01/04/2026

The dump we originally received appeared to have been modified. The header checksum didn't match. We received another ROM that matched the header checksum, which led us to believe that the ROM we initially received had been modified somehow. There are only 4 bytes different in total.

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Proto Challenge @protochallenge.bsky.social · 31/03/2026

You may recall we announced that a live stream showcasing new prototypes would be happening sometime in March. We've delayed this stream to April 4th at 3:15 PM UTC. More details will be announced in the coming days.

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Proto Challenge @protochallenge.bsky.social · 27/03/2026

We've uploaded gameplay to our YouTube channel! (subscribe for more cool stuff in the future 👀) www.youtube.com/watch?v=N-cc... www.youtube.com/watch?v=k7S3...

youtube.com

40 Winks (Unreleased GBC) Longplay - Ruff

YouTube video by Proto Challenge

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Proto Challenge @protochallenge.bsky.social · 27/03/2026

This is a prototype of the unreleased Game Boy Color version of 40 Winks! This build has 6 playable levels and 2 playable characters (Ruff and Tumble). It seems to have been from very far along in the game's development. archive.org/details/40-w...

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Proto Challenge @protochallenge.bsky.social · 24/03/2026

Today, we bring you a prototype of Mario's Picross for the Game Boy! Dated January 23rd, 1995, this build comes a few months before release and contains different puzzles, a different Super Game Boy title screen, and other graphical differences. archive.org/details/mari...

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Proto Challenge @protochallenge.bsky.social · 26/02/2026

Today marks 15 years since the 3DS released. To celebrate, we'd like to announce that in March, we'll host Proto Direct: a live stream showcasing newly found game prototypes for 3DS and other systems too! We'll announce an exact date/time at a later date. Follow us here to get notified of updates!

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