Completed The Secret of Cinnabar Mansion

This project is complete. Any future revisions will be bug fixes or small updates.

The Secret of Cinnabar Mansion
Relic Castle Game Jam 2015 -- Judge's Choice

Hi everybody! I'm Twitch, and this is my game, The Secret of Cinnabar Mansion. I made it over the course of about a month for the Relic Castle Summer 2015 Game Jam. It was my first time using Pokemon Essentials to make my own game entirely from scratch, and developing it was a fantastic learning experience. I wanted to explore making a game in the style of Gen One and expand on some areas of canon that I felt had a lot of potential. Thanks to COMBOY's Pokemon GS Essentials kit, making a retro-styled fangame was easy even for a beginner, so I definitely couldn't have done it without the hard work of him and everyone else who contributed to its creation.

I'm so thrilled and flattered by the positive reception this game has received. I was not at all expecting to win Judge's Choice for my little hour-long game, either. I'd like to thank Relic Castle so much for the inspiration and the encouragement I needed to make this -- thanks so much, everybody!

A narrative-focused game in the style of Pokemon Red and Blue. Explore and discover the mysteries of the ruined mansion on Cinnabar Island. You play as a scientist tasked with delivering a package. Read all the journals and uncover the mystery of why the mansion was abandoned -- but be wary of hostile trainers and wild Pokemon!

This game takes about an hour to complete. There are 2 endings, so try and find them both! It's not too hard, but if you get stuck on trying to get the Good Ending, feel free to PM me and I'll tell you how you can do it.

  • 100% Completed Game
  • Nostalgic 8Bit Graphics
  • Choose between three partner Pokemon: Magneton, Porygon, or Weezing!
  • 2 Endings
  • Fantastic music by GlitchxCity


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  • Concept - Nintendo/Game Freak​
  • Pokémon Essentials - Flameguru/Poccil/Maruno
  • GSC Essentials - Comboy
  • Tiles - RBY Tileset from the Spriters' Resource, custom edits by me
  • Music - Pokemon Mansion Remix by GlitchxCity, Pokemon RBY music from VGMusic
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TheGamingPaladin - Youtuber, Foodie, Gamer 4 Life
Apr 19, 2017
hmm, as i read this, i have the distinct feeling that the alternate/true ending happens only when you find all the journal entries... alrighty then, challenge accepted!


Mar 23, 2017
I really enjoyed playing through this game. The aesthetic of Gen1 is a really nice thing to see and it, in general feels really underused in fangames. You could say that's for good reason, as it can begin to get a little boring and if you were to use a retro design you could use Gen2 but it still brings back that classic nostalgic feel.

The only issue I had was the mix of styles (not sure how else to word it), the remixes really didn't mix well with the extremely retro style imo. It didn't detract from the gameplay or story which I understand were meant to be the focal point but it still was a little jarring to hear. Other than that though, this was still a really nice experience to play through.


The Greenest of Noibats
Mar 24, 2017
Hey there Twitch! I recently completed The Secret of Cinnabar Mansion, and as I have with every game I complete I figured it was time to add my thoughts pf the game!

And man does this game deliver! You were able to take a very simple concept and make it so much fun to play! I cant tell if it was the gen 1 style, or the story told in the journal posts, or just rexperiencing part of Cinnabar Mansion for the first time in years that brought a lot of aqesome nostalgia back to me. I enjoyed the variety of starting pokemon that fit the theme of the scientist, and even in a game jam you were able to make a game with a clear and caring message, while making one of pokemon's first villains into true villains again, even for at least a short while.

For anyone reading this review, I absolutely recommend playing the Secret of Cinnabar Mansion! You will not be disappointed!

Majestic Senzu

Cautiously Optimistic
May 23, 2017
Ok so, I played this game a while back (a few months ago) and...I loved it! I love games that get right into the good stuff. This game was ALL good stuff. I enjoyed exploring the mansion and I am fairly certain I found all the journal entries.
I got the ending where Mewtwo killed the Rocket member that forced you to explore the Mansion. I don't know which ending that was but it was definitely satisfying.
Anyways, kudos to you, Twitch! Seriously, if you haven't, play this! It's short, sweet, and well crafted.

Also, screw that thief with the Rapidash. My poor Magneton got schooled by it the first go-around. :(

EDIT: Well, I can't find my save file...I guess I have to beat it again!
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Feb 8, 2018
Wow, I love rom hacks/fan made games that explore Mewtwo's history, I love all the conspiracy behind the scientists, the researchers, and what they're trying to cover up! Especially getting to interact with Mewtwo himself and listening to his point of view, what a fun game!


Jun 20, 2018
hmm, as i read this, i have the distinct feeling that the alternate/true ending happens only when you find all the journal entries... alrighty then, challenge accepted!
probbably so i haven't played it myself but maybe the juornals might uncover a secret that you need to find to get get the good ending
i dont know im just a kid