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Mysteria ~Occult Shadows~
Explore the land of Sulnas as the "Shadow of Death", a cat girl who's dauntless and fierce. The land is poisoned by secret power and desperately needs salvation. Can you save it from its sure demise or will you doom its fate like everyone else would?
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via SteamSpy as of 2026-05-13.
“Very cute game ♥ Meow! Meow! ♥ (ʻʻʻ)_(=^･ω･^=)_(ʻʻʻ) ≽^•⩊•^≼ Hi hi? Just buy it on sale ok, Guys and Gals?! ITS LAG AF LMFAO”
— a player, Steam review · 2 hrs played“Absolutely peak. Playing it felt like a dream. The story, the characters, the music, the design, every single piece of art, everything was flawless. Each element came together to form an absolute masterpiece, something to admire from every possible angle. The entire industry…”
— a player, Steam review · 1 hrs played“It has the Hentai tag in steam, but this is not a hentai game at all, sure there are some lewd outfits for your character and you can turn on a transparent clothing option, but there is no nudity here. The gameplay itself is a bit jank and stiff, you can button mash and still…”
— a player, Steam review · 3 hrs playedPrice tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-08-04). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
HD Point Shop Items Now Available! New Game on Autumn Sale at Lowest Price
With the previous experience from creating items for "Mysteria Beast Girls", this time we’ve made even higher-quality Point Shop items for our new title "Rebellion Godsoul" ! ✨ Seamless Loop · Ultra H
[Important] Beautiful animated avatars and backgrounds are now available
Dear Beastgirl fans: We've quietly added new items to the Steam Points Shop—now you can reunite with those beautiful fantasy scenes once again! If you're interested, feel free to decorate your Steam p
Click to Get Ultra HD Swimsuit Wallpaper + New Release on Summer Sale!
Dear Mysteria fans, long time no see~ Here's a high-res swimsuit wallpaper of our beast girls! Although we no longer own this IP, we sincerely thank you for your past support. Please accept this wallp
Our all-out new game is crowdfunding on Kickstarter.
Our new game, Rebellion GODSOUL, is currently crowdfunding on Kickstarter~ This game is the sole intellectual property of our development team (u-secret studio), and we've spent 3 years developing it
new discord link
https://discord.gg/3mWFr5QAZ6 welcome join our discord~have some cute wallpapers!
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Genres | Action, Adventure, Indie, RPG |
| Player tags | Sexual Content · Action · Female Protagonist · Anime · Nudity · RPG · Adventure · Indie · Hack and Slash · Gore · Cute · Violent (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Trading Cards · Partial Controller Support · Family Sharing |
| Languages | Simplified Chinese, Japanese * , English, Traditional Chinese * |
| Achievements | 39 |
| Estimated owners | 100,000 – 200,000 (SteamSpy) |
| Official site | http://u-secret.net |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Win7 64Bit/Win8 Win8.1 64Bit/Win10 64Bit Processor: Intel G620 or AMD X2 280 /AMD (APU) A6 9500 Memory: 6 GB RAM Graphics: Nvidia GeForce GTX750 or AMD GPU Radeon HD 6850 DirectX: Version 11 Storage: 15 GB available space