iiinova — where your digital self keeps evolving

retrodotcards.com @retrodotcards.com · 24/09/2026

Pretty surreal to be in a print magazine. 12 year old me would be proud. (Issue 66 of Return Magazine, a German retro game magazine)

A photo of Return Magazine, open to the page on the ereader. On the left side is a story about the Series One games and a photo of me holding the cards up.

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retrodotcards.com @retrodotcards.com · 23/09/2026

I'll have a booth at the Detroit Retro Gaming Show on November 7th. I'll have Series One cards for sale, free ereader cards, Pixel Pup to play (including two player) and a very early look at Eridin, my upcoming strategy game for both GBA/e-reader and PC. www.detroitretrogamingshow.com

detroitretrogamingshow.com

Home | Detroit Retro Gaming

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retrodotcards.com @retrodotcards.com · 21/09/2026

I am reviving my alt account. It's now a general dev log. If you want small, frequent updates as I work on my game (coding, graphics, music, all of it), check it out. This main account will be more focused on major milestones, announcements, and ereader/gba tidbits.

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retrodotcards.com @retrodotcards.com · 20/09/2026

If you want to make sure you see everything in Pixel Pup, I whipped up an Easter eggs page. Each secret is hidden behind spoiler text. www.retrodotcards.com/pixel-pup/ea...

retrodotcards.com

Pixel Pup - Easter Eggs

All of the hidden easter eggs in Pixel Pup

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retrodotcards.com @retrodotcards.com · 17/09/2026

I wrote up a quick blog post talking about why I'm making a game for both the GBA and PC of all things. It also goes a little into the how side. www.mattgreer.dev/blog/making-...

mattgreer.dev

Making a game for the GBA and PC from the same codebase

Why and how I am making a game for two very different platforms.

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retrodotcards.com @retrodotcards.com · 16/09/2026

Retro Achievements so far has Pixel Pup at about 15 hours to complete, which is about right imo. retroachievements.org/game/42809 #gba #homebrew

A screenshot of the Retro Achievements stats table showing "beat the game" took 5 players a median time of 15 hours and 40 minutes, and "mastered" also took 5 players 15 hours and 40 minutes.

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retrodotcards.com @retrodotcards.com · 15/09/2026

The PC version of Eridin will largely be just like the GBA version. But it will get some quality of life improvements and graphical flourishes here and there. Here's a simple example. #gamedev #indiedev #whatbigpixelsyouhave

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retrodotcards.com @retrodotcards.com · 14/09/2026

Last post on this. The store closes tonight at 10pm eastern. Back to your regularly scheduled doom scrolling.

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retrodotcards.com @retrodotcards.com · 13/09/2026

The RetroDotCards store will shut down tomorrow at about 10pm eastern. retrodotcards.bigcartel.com

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retrodotcards.com @retrodotcards.com · 12/09/2026

My first goal for my GBA/e-reader/PC strategy game is to bring this screen to life. #indiedev #screenshotsaturday

A screenshot of the battle intro screen. It shows a rabbit-like creature with a cape, sword, and a worn out look on his face. He is facing a goblin who holds a sword, is wearing leather armor, and has a goofy look on his face.

The text reads "Rimcain: Invasion of Ru'oal Village"

The background is a fantasy style map in beige/grey.

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retrodotcards.com @retrodotcards.com · 11/09/2026

I'm making my next game be both a GBA/e-reader game and a PC game, from the same code base. This will be a good deal of extra work, but it will be worth it.

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retrodotcards.com @retrodotcards.com · 10/09/2026

The RetroDotCards store is shutting down in 4 days. International shipping is now $9 cheaper. retrodotcards.bigcartel.com

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retrodotcards.com @retrodotcards.com · 08/09/2026

I think an e-reader game that communicates over the wireless adapter might be possible. It would be just about the most asinine video game ever made, which intrigues me :)

Two Game Boy Advances both with an e-reader plugged in, then a wireless adapter plugged into each e-reader.

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retrodotcards.com @retrodotcards.com · 03/09/2026

Hmmm ... nearly 5000 files changed. Oops, I had regenerated all of the random puzzles. Even when you're the sole developer on a project, code review is still good practice. #indiedev

A screenshot of a GitHub diff showing that from version 1.0.4 of Pixel Pup to 1.1.0, over 4800 files changed.

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retrodotcards.com @retrodotcards.com · 03/09/2026

Pixel Pup 1.1 will either be out this evening, or tomorrow at the latest.

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retrodotcards.com @retrodotcards.com · 02/09/2026

Sometimes puzzle race mode will really challenge your puzzle solving skills. Such as this doozy.

A screenshot of a puzzle in pixel Pup. The entire puzzle is empty except for one tile.

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retrodotcards.com @retrodotcards.com · 02/09/2026

Even just testing puzzle race mode by myself is fun. I'm excited for my wife and I to compete. If it leads to me sleeping on the couch, I have succeeded! 😛

A screenshot of puzzle race mode in Pixel Pup. It shows two players solving 5x5 puzzles with an indicator in the lower corner showing how far into the race each player is.

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Reposted by retrodotcards.com

retrodotcards.com @retrodotcards.com · 01/09/2026

The RetroDotCards store will close on September 14th. I will be selling packs at the Detroit Retro Game Show, November 7th. There's a good chance after that, the cards will be unavailable for purchase. retrodotcards.bigcartel.com

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retrodotcards.com @retrodotcards.com · 01/09/2026

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retrodotcards.com @retrodotcards.com · 31/08/2026

Issue 66 of Return, a German retro gaming magazine, has an article on the e-Reader. They also added a side article about the Series One games. I never thought I'd be in a game magazine 😲

An image of the e-reader article in the magazine. On the left is an article about the e-reader in general and its history. On the right is an article about RetroDotCards Series One e-reader games.

The articles are in German.

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retrodotcards.com @retrodotcards.com · 31/08/2026

To add wireless support to Pixel PUp, I almost had to do ... nothing at all. Just some wireless graphics here and there. afska's GBA networking library just handles both modes seamlessly. If you are a GBA dev, this library is awesome. github.com/afska/gba-li...

A screenshot of Pixel Pup, showing the players about to start a two player session. It is asking them to either attach a link cable, or wireless adapters, then press A to connect.

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Reposted by retrodotcards.com

StopSkeletonsFromFighting @stopskeletons.bsky.social · 29/08/2026

It’s out!! The game TOO HOT for the GBA e-Reader, Pixel Pup!

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retrodotcards.com @retrodotcards.com · 29/08/2026

Wireless support is going swimmingly.

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Reposted by retrodotcards.com

Jay (Ronin Op F, Abandon God For Sofa) @roninopf.bsky.social · 26/08/2026

heyyyy are we still solvin' the puzzles??? the tracks i wrote for pixel pup are up everywhere if you're craving to listen to them if the art museum pack hasn't made you too mad ffm.to/pixel-pup

Cover image for the Pixel Pup original soundtrack album

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retrodotcards.com @retrodotcards.com · 25/08/2026

I'm working on Pixel Pup 1.1 Some bug fixes, polish, wireless adapter support, and a new two player mode: Puzzle Race. Who can solve a series of puzzles first?

A screenshot of Pixel Pup's two player mode menu. It shows the options competitive, cooperative and puzzle race. Puzzle race is focused.

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retrodotcards.com @retrodotcards.com · 24/08/2026

Pixel Pup came out just in time, to, um ... celebrate? Windows 95's anniversary. Hope you don't get a blue screen of death! 😛

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retrodotcards.com @retrodotcards.com · 23/08/2026

If you are playing Pixel Pup but don't have the e-reader, head into the e-reader menu and enter the Konami code. It will unlock one puzzle. Not a big deal, but it will also add the e-reader puzzle environment into random, which is a nice plus.

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Reposted by retrodotcards.com

retrodotcards.com @retrodotcards.com · 21/08/2026

Pixel Pup, a #picross style game for the #GBA is now available! There's a demo too. retrodotcards.itch.io/pixel-pup #indiedev #gameboy

retrodotcards.itch.io

Pixel Pup by RetroDotCards, objetdiscret

A nonogram game for the GBA

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Reposted by retrodotcards.com

𝕠𝕓𝕛𝕖𝕥 𝕕𝕚𝕤𝕔𝕣𝕖𝕥 @objetdiscret.itch.io · 21/08/2026

I wrote a #devlog to talk about the development of Pixel Pup and Taiyaki Fabulous Test Kitchen: objetdiscret.itch.io/tai-fab-muse... I'm so excited that #PixelPup is out TODAY, and I'm looking forward to bringing you #TaiFab 2 later this year! 🎉 #GBA #GBC #IndieDev #GameDev #homebrew

objetdiscret.itch.io

Pixel Pup + TaiFab 2 News

Hello, Fishcross Islanders! If you're a TaiFab fan, you may be interested to hear about my current nonogram gamedev projects, Pixel Pup and Taiyaki Fabulous Test Kitchen. Pixel Pup Last year, I heard....

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retrodotcards.com @retrodotcards.com · 21/08/2026

Thanks for the great review, @gbrewfr.bsky.social ! Glad you liked the game!

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retrodotcards.com @retrodotcards.com · 20/08/2026

I was testing extra large puzzles in two player mode in Pixel Pup when this happened. Compare the right side of each board. Uh oh.

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Reposted by retrodotcards.com

𝕠𝕓𝕛𝕖𝕥 𝕕𝕚𝕤𝕔𝕣𝕖𝕥 @objetdiscret.itch.io · 20/08/2026

This model has Franny art from both @retrodotcards.com and me! 🐶 We made #PixelPup (a #GBA #nonogram game) and it's releasing TOMORROW!! Get it here: retrodotcards.itch.io/pixel-pup ✨ Lots of puzzles! Solo and multiplayer! Fun Easter eggs! ✨ #PixelArt #ドット絵 #picoCAD2 #IndieDev #GameDev #homebrew

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retrodotcards.com @retrodotcards.com · 19/08/2026

After setting aside a lil chunk for the Detroit con in November, I'm left with 90 English Series One packs. I'm not usually a FOMO inducing kinda person, but I am pretty sure I'll never be able to reprint these.

A cardboard box with 90 packs of Series One English cards

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retrodotcards.com @retrodotcards.com · 19/08/2026

The demo version of Pixel Pup has a mosaic that is not in the full release. So if you want to maximize your Pixel Pup puzzling goodness, grab both!

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Reposted by retrodotcards.com

Daniel J. Menezes @danjohnston.uk · 16/08/2026

Hey! Are you an indie dev who doesn't use gen AI and have a game you're currently promoting? I'm looking to make a starter pack and you could be in it! Reply below with a link to your game 👇 go.bsky.app/78u8M6Y

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Reposted by retrodotcards.com

𝕠𝕓𝕛𝕖𝕥 𝕕𝕚𝕤𝕔𝕣𝕖𝕥 @objetdiscret.itch.io · 18/08/2026

Did you know that the heroine of #TaiFab actually has a name?? 😮 You can find out in #PixelPup, the #GBA #nonogram game from me and @retrodotcards.com! Get our new game THIS FRIDAY: retrodotcards.itch.io/pixel-pup 🎉 #PixelArt #ドット絵 #vanillamilkpallete #picoCAD #LowPoly #IndieDev #GameDev #homebrew

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Bucket Mouse @mousebitelabs.bsky.social · 18/08/2026

The new Game Boy Enhance model, the AGBM-02, is finally here! This is a replacement board for the AGBM-01, and uses AA batteries. For the uninitiated, my Game Boy Enhance design is a circuit-level recreation of the original GBA - it requires the use of the original CPU, so it's not emulation! 🧵

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retrodotcards.com @retrodotcards.com · 17/08/2026

I just let the Pixel Pup beta testers know the final build is available for them to try. Woohoo! And the final build will be available to everyone this Friday. There will also be a demo. retrodotcards.itch.io/pixel-pup #indiedev #gba #picross

retrodotcards.itch.io

Pixel Pup by RetroDotCards, objetdiscret

A nonogram game for the GBA

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retrodotcards.com @retrodotcards.com · 16/08/2026

Each time you go into the e-reader menu, a different Franny from the e-reader version of Pixel Pup will appear. A small way to keep the canceled e-reader version alive. Pixel Pup will be available for the #GBA this coming Friday! retrodotcards.itch.io/pixel-pup

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retrodotcards.com @retrodotcards.com · 14/08/2026

Pixel Pup's puzzle menu was the most challenging thing to build. As you move through the menu, sprites, tiles and palettes need to load and unload. If I forget to unload just one thing, that leak will eventually make the game crash. I created a stress tester to verify there are no leaks. #gamedev

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retrodotcards.com @retrodotcards.com · 13/08/2026

Pixel Pup's e-reader feature worked great for all cards ... except ... Solitaire? Why? I have *no idea*. The good news I was able to get it working and thus the e-reader feature is not compromised. But this is the risk of doing more obscure game development...

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retrodotcards.com @retrodotcards.com · 12/08/2026

GB-Link USB v2's crowdfunding campaign is now live. This is a cool device that let's you do GB and GBA link-cable shenanigans from a web browser (PC or phone). Multiplayer matches, load e-reader cards and more. www.crowdsupply.com/gblink/gblin...

crowdsupply.com

GB-Link USB V2

A USB-to-Game-Boy Link adapter that brings retro multiplayer online through your browser

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retrodotcards.com @retrodotcards.com · 10/08/2026

Not sure what all this e-reader stuff is in Pixel Pup? Scan the QR code for more help. It will take you here: www.retrodotcards.com/pixel-pup/e-...

The e-reader menu in Pixel Pup, a game for the Game Boy Advance. Franny the dog is saying "Scan the QR code for more info." There is a QR code in the lower left.

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retrodotcards.com @retrodotcards.com · 07/08/2026

Pixel Pup, a nonogram/picross game for the #GBA, will be available on August 21st. You'll be able to get it here: retrodotcards.itch.io/pixel-pup There will also be an updated demo.

retrodotcards.itch.io

Pixel Pup by RetroDotCards

A nonogram game for the GBA

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