Luke is now going to explore the most known abandoned mansion around the city. But this time things aren't the same. This particular mansion feels way different from any other than he had ever explored until now.  He now finds himself locked and needs a code to escape from the mansion. The more he explores the stranger things become.

Maybe the rumours were more than that.

On January 21st, 2021,  join Luke and discover all the secrets from the abandoned mansion in order to escape from it.

  • A narrative-driven, single-player puzzle game with a charming mysterious atmosphere.
  • Massive interactions with the environments that make you feel driven into the game.
  • Meticulously crafted puzzles that test your observation and focus skills.
  • Easy and accessible inputs!


The controls in this Vertical Slice are easy and accessiblesimply interact with 'Z' and move. But with layers of exploration, these controls can do way more than you think at first.

The Studio

Misteryium® was developed by Rio Studios® for a college project- any generous contributions will go right towards making our future games more awesome!

Selected Articles

- "Challenging Puzzles." - Filipe Silva,  MoshBit Gaming

- "Acessible Inputs" - Catarina Ferreira, Magazine.HD

- "Mysterious atmosphere" - Telmo Couto, Meus Jogos

- "It really feels like a Game Boy Game" - Daniel Silvestre,  Próximo Nível

- "An atmosphere of suspense and mystery" - Paulo Silva,  Pplware

- "Unique interactions with the environment " - Tiago Cruzeiro, Portugal Gamers

- "A greatly developed atmosphere, reminiscent of Undertale" - Fábio Simão,  NewEsc


Ruben Sousa - Twitter

Diogo Frazão - Twitter

Eduardo Peixoto - Twitter

Made with GB Studio

Some assets found here.

Rated 5.0 out of 5 stars
(8 total ratings)
AuthorsRio Studios, Diogo Frazão
Made withGB Studio
TagsAtmospheric, Exploration, Game Boy, misteryium, Mystery, Narrative, Pixel Art, Singleplayer, Top-Down
Average sessionAbout a half-hour


Download NowName your own price

Click download now to get access to the following files:

Misteryium ROM 67 kB


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I liked this game. Well done!

Thank you so much, it means a lot!

It's not my kind of game, but I felt really good playing it. Miesteryium made me feel like a genius in solving the various puzzles that are not repetitive and give us a sense of achievement when we perform them.
Congratulations to the team!

Thanks for the kind words, we're glad you enjoyed the game!

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This game is really well done, good job everyone, you not only amazed us all but also inspired us to do better!

Keep on the great work!


Thank you, we're glad to know that our work motivated you guys as well :)


Very interesting story for this short of a game! Had me very hooked since the beginning! The nostalgia the GB graphics made me feel was incredible! I have only good things to say about this game, amazing job!


Thank you very much, we're glad to know you liked the game :)


I really liked the game, and I was curious to know about the mystery of this place, and nothing better than being able to have the feeling of playing GB games made today, I hope you continue the project! Congratulations for the game. o/

Thank you so much, we really tried to make the atmosphere of the game feel both mysterious and intense!

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I loved the little details of this game, it's a shame it ends so early I was really into it. The art style is also very nice! Keep up the good work!

Thanks for the kinds words! Since this is a vertical slice it is quite short but we're happy to know you had a great time while playing it :)


I was the first tester of this game, i expect much from this game, big dick energy from the developers, LOK'TAR OGAR!!!!

:D Thank you!!


Este jogo está mesmo muito bom!!! Já quero o jogo completo para saber como acaba! Fascinante!!

Muito obrigado! Neste momento dar continuidade ao jogo não está nos planos de um futuro próximo mas estamos a trabalhar em outras coisas relacionadas a ele :)