Cosmo Knight ZiON (GameBoy Color)
A downloadable game
** THE ONLINE PLAYABLE VERSION IS ONLY A DEMO. **
** LA VERSIÓN JUGABLE EN LÍNEA ES ÚNICAMENTE UN DEMO. **
Zeichi social links
LAST UPDATE 21/02/2026
Release date: October 29, 2025.
** The game is available in English and Spanish. **
** El juego está disponible en inglés y español. **
ABOUT THE GAME
An invasion of androids from outer space has reached Earth. Zion and Eerie find themselves surrounded by these strange androids who relentlessly capture humans. Faced with this situation, Zion is forced to use his martial arts skills to fight the enemies. With the help of cosmic armor obtained from one of the invading androids, he will embark on a crusade to save Eerie and the other humans. Immerse yourself in a retro adventure that will transport you back to the golden days of handheld consoles.
Cosmo Knight Zion is a classic platform game, like those that were so popular in the 90s. It offers levels full of excitement, hidden elements, enemies to defeat, beautiful scenes that tell the story of the game, and powerful level bosses that will remind you of the challenging difficulty of yesteryear. Cosmo Knight Zion brings you the full retro experience of handheld consoles.
A RETRO-STYLE JOURNEY
Classic retro-style platform game inspired by the famous handheld consoles of the 90s. Jump, hit, collect items, and get power-ups as you advance through challenging levels and face powerful bosses. The key to success is not giving up and knowing your enemy. Will you make it through with your armor intact?
EXCITING FEATURES
- In-game manual.
- Five challenging levels
- Powerful level bosses
- Secret bosses
- Collectible items
- In-game achievements
- Story told through Pixel Art vignettes
- Retro music and graphics with a pixelated style
What's included?
- The Windows edition of Cosmo Knight Zion.
- The digital mini-comic that tells the story leading up to the events of Cosmo Knight.
- The digital soundtrack with the game's music composed by MikeXfm, in both ChipTune and enhanced versions.
- The Analogue Pocket edition (available later).
- The GameBoy Color edition (available later).
| CONTROLS / CONTROLES | GAME BOY | KEYBOARD |
| MOVE / MOVER | D-pad | Arrow Keys / Flechas |
| JUMP / SALTO | A | Z |
| ATTACK / ATAQUE | B | X |
| PAUSE / PAUSA | START | ENTER |
| NO USE / SIN USO | SELECT | SHIFT |
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Project credits:
Programming: Zeichi
Character design: NiO107
Music: MikeXFM
Cosmo Knight Zion © 2024 by Zeichi Games is licensed under CC BY-NC-ND 4.0
Purchase
In order to download this game you must purchase it at or above the minimum price of $7.50 USD. Your purchase comes with a Steam key. You will get access to the following files:
Download demo
Development log
- Update Announcement – Version 4.06 R115 days ago
- New and Improved Cosmo Knight Zion ROM (v.4.04 R6) and Ongoing Support Commitmen...Oct 29, 2025
- New public demo / Nueva demo pública (2024)Apr 24, 2024
- Kickstarter campaign now live!Apr 06, 2024
- New demo update 13/05/2023May 13, 2023
- Cosmo Knight ZiON demo has been released.Apr 23, 2023
Comments
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Anymore ways to get a physical GBC cart?
Hi, soon we would be able to release a few more carts for those that missed the Kickstarter, keep in touch or follow ZeichiGames on X to know when and where.
Wow! I'm only one stage in, but the graphics, gameplay, and music are fantastic. It feels so authentic, that I have a hard time believing it didn't come out in 1990!
Is a digital manual included?
Yes, but only within the executable version for Windows.
I'm interested.
Super cool game!
Van a hacer algun release en formato físico?
Saludos, en la campaña de Kickstarter se crearon ediciones físicas, y algunas de ellas estarán disponibles en el futuro en cantidades muy limitadas a través de nuestro distribuidor. Más adelante se anunciará dónde podrán encontrarse estas ediciones limitadas.
🔥
Hola ¿ya hay alguna fecha de salida?
Saludos, oficialmente ya tenemos fecha: será el 29 de octubre de 2025 en formato digital.
Hola,ha pasado un buen tiempo, me gustaría (y sería un honor) poder analizar tu título para la página en la que redacto.
¿Tienes algún mail?
El honor sería todo mío, puedes contactarme si quieres a través de alguna de mis redes sociales que encontrarás en los enlaces de este sitio. O bien este linktree: https://bit.ly/m/Zeichi
¡Saludos!
on a site with uploaders abusing the hell out of tags, THANK YOU for putting "A GameBoy Color Platform game."
I loved that so much!!!
Thank you very much, we continue working on this game, new original music is being created for it.
Nice game !
Thanks for the video, there will be more news soon.
Pretty awesome. Competent work. Good work
Thank you for your kind words! We're glad that you think our work is competent and we appreciate your support. We'll keep working hard to make the game even better. Thanks for playing!
This is great! Love the gaining and losing armour, has that Altered Beast/Ghost & Goblins touch, and plays like a really cool GBC Shinobi. Great work
Thank you so much! I'm thrilled that you are enjoying the game and appreciate your feedback. We were definitely inspired by classic games like Ninja Gaiden and Ghosts & Goblins, and we're glad to hear that the gameplay has a cool Shinobi vibe. Thanks for playing and sharing your thoughts!
Oh man, this is looking slick! I love it!
Thank you so much! I'm glad you like it! We are working hard to bring a great gaming experience.
This game shows a lot of talent, and is so far one of the best GB homebrew titles out there, so I think moving in this direction away from the licenced property it was based on is a great idea. Looking forward to seeing where it goes.
Thank you very much. It was an interesting decision to want to take advantage of the already created game. The project is progressing very well and is becoming something totally different from the original fangame. I really hope you like this new project.
A decir verdad, esto me recuerda a los cambios de Contra a Probotector, o Hiryu No Ken a Flying Warriors, y eso es lo que lo hace interesante XD. Cuando salga le echaré un vistazo.
Justamente, la idea es utilizar el motor base, pero adaptarlo a esta nueva aventura. Espero también quieras probarlo y pases un buen momento justo como el con el juego anterior.
súper genial!
¡Gracias! espero este nuevo proyecto sea tan genial o mejor que el pasado.