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Watch trailer on Steam ↗Monster Crown: Sin Eater
Studio Aurum · Published by Studio Aurum, Red Art Games · Official site ↗
Very Positive — 86% positive (205 reviews) · 11 achievements
Last updated 3 Oct 2026
Hand-craft your team of perfect Monsters and wage a one-man war against fate and the world in the Crown Nation! With a True Crossbreeding system, every Monster is entirely your own!
£17.99
£22.49Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Adventure, Indie, RPG, Strategy · 2026 · More £15 - £30 games
Explore the Crown Nation as you hand-craft your team of perfect Monsters for battle. In this indie adventure RPG from Studio Aurum, every crossbreeding decision shapes a unique warrior to fight fate and the world against you.
About this game
Explore the beautiful, textured and detailed environments of The Crown Nation, solely brought to life by our environment artist Arex. Immerse yourself in the soundscape of Sin Eater by music directed by Onion_mu and the sound team. Breed over 1000 unique monster sprites lovingly crafted by RacieB with the most robust and polished true crossbreeding system implemented in a video game by Kyle Toom.
Game Director APE-AHAB, in partnership with Jason Walsh (the mastermind behind "Monster Crown") have a truly wild world and mind-bending story in the works for you to experience. Start your journey through the madness of Monster Crown: Sin Eater.
With over a thousand unique, hand-crafted Monster sprites, and hundreds of colors to choose from, you'll find the ace Monster that's right for you! And once you've found your favorites, use Monster Crossbreeding or perform Monster Fusion to reach new heights!
The game's storyline puts you in the shoes of Asur, a young farm boy who has aspired to be a Monster Tamer his whole life, just like his big brother. When his family is put in mortal danger, he must act to set things right, and change the Crown Nation forever.
Be sure to build yourself a powerful team of mighty companions. Turns out, Asur won't have much luck going it alone!

Certain Monsters also transform when exposed to certain elements. Be sure to try strange new items on your favorite Monsters — you never know what's going to happen!

With so many monsters, obtaining them all, their crossbreeds and their transformations (and the transformation's crossbreeds) is quite an undertaking, only serious collectors should attempt this!

Along the way, you'll explore towns packed with interesting characters. Another way Monster Crown: Sin Eater elevates the standard tropes is with branching dialogue and decisions that have a real impact on the game.

You'll travel the world and encounter Monsters roaming the wilds. Each one has a personality; some will flee from you, some will give chase, some — the more sinister Monsters — will stalk you from the shadows.

Think you have what it takes to make it in the Crown Nation? Download our free demo today to enjoy a taste of what we've got cooking.
System Requirements
Will my PC run this? →Minimum
- OS: 10/11
- Processor: Intel/AMD
- Memory: 2 GB RAM
- Graphics: Integrated/Dedicated
- Storage: 3 GB available space
Recommended
- OS: 10/11
- Storage: 3 GB available space
Supported Languages
Latest news
Patch NotesOfficial
Patch 1.0.4 - Many Improvements
Hello Monster Tamers! I hope you all have been enjoying Monster Crown: Sin Eater. We've got an update for you today that comes with some highly requested features that I hope you'll enjoy. Breeding/Fusion/Box System One big one is that the breeding/fusion menu has been totally revamped. You can now add/remove monsters from boxes quickly and swap parent slots easily all from one screen. When you choose to perform Fusion/Breeding there's also a totally new screen that lets you quickly choose stats from the parents and see how it will impact the result monster. To help illustrate this change, here's a quick video where you can see it in action. I think you'll agree that this is a big upgrade in the way you can interact with our box system and fusion/breeding systems, letting you spend more time doing the part you love (making new monsters and getting them into your party to explore with). Battle SpeedYou can now enable doubling of animation speed in battles. See below for details on how to turn this on! Balancing We've added a new element to the Four Heavenly Kings and Inquisitors. After defeating your second Heavenly King (the first after you leave Windy Province) the remaining HK and Inquisitors will have their level scaled up to provide a more appropriate challenge level as you fight through them. We're going to be listening very closely to your feedback on this, both conceptually and after trying out the new challenge level. While you can read the full list below, some other quick shoutouts are: You can now more easily travel to Meru Spire and navigate the levels Achievement requirements tweaked Model 19 now appears more frequently Improvements for Randomizer players Sidequest sequence tweaks/fixes in the notebook We're definitely very focused on the feedback all of you have shared in our discord, on steam reviews, forums and reddit. Thank you so much for playing our game and giving such well thought-out feedback. For any console players reading, this patch is head...Read full article on Community Announcements (devotedtoneurosis)Patch NotesOfficial
THANK YOU! + First Post-Launch Patch
Hi Everyone,Thank you so much for the massive outpouring of support you've all shown over the past week! Our launch has been an incredible time for the studio and a dream come true. Seeing the reviews, all the active players on various platforms, we're blown away by everyone who has decided to take the time to enjoy MONSTER CROWN: SIN EATER!We've got a patch in store that includes adjustments that many of you requested on the steam forums. We're listening closely to what you're feeling as you navigate the Crown Nation and we hope that this patch increases the fun you all have as well as the ease of access for new players. Let's pass it over to the director of the project, APE-AHAB for specifics!--Version 1.0.3 Patch Notes:Party-wide Experience Share has been added to Give Me A Story and Give Me A Challenge difficulties, which can be toggled on in the options menu. Give Me A Story offers a larger share of 50%, while Give Me A Challenge offers a smaller one of 30%.Added an option for toggling the Run button with X key/Right Face Button.Altered some dialogue in cutscenes for greater narrative effect.Various quest inconsistencies have been fixed.Various map fixes.Transforming a Monster at the level it would ordinarily learn a move will give the Monster that move.Fixed an oversight involving Brilliant palettes when breeding a Transformed Monster who breeds to an Untransformed Monster.Reworked a number of traits;SEABORNE Monster's base speed is halved unless the player enters a battle while surfing.GLOWING All moves that target this Monster have +10 ACC applied.NOCTURNAL Whenever the clock is between 8:00 and 20:00, this Monster will always move second every other turn.AIR STRIKER (Replaces Airborne) If sent out on the first turn of a battle, this Monster will always move first on that turn.LUNAR CHILD (Replaces Shadowborn) Active Golden Moons increase this Monster's critical hit rate by +10%.Fixed a problem where some bosses were being scaled improperly on Give Me A Chal...Read full article on Community Announcements (devotedtoneurosis)Press Coverage
Pokemon-like monster catcher Monster Crown: Sin Eater arrives April 30
Monster Crown: Sin Eater from Studio Aurum is now set to arrive on April 30th, hopefully with some lessons learned from the original. Read the full article here: https://www.gamingonlinux.com/2026/04/pokemon-like-monster-catcher-monster-crown-sin-eater-arrives-april-30/Read full article on GamingOnLinuxAnnouncementsOfficial
SIN EATER Launches April 30th 2026!!!
We're very proud to officially announce the release date of Monster Crown: Sin Eater.April 30th 2026!!!Take a moment to check out our release announcement trailer.We've got such an action-packed journey through the Crown Nation planned for you, with more monsters than you can handle!Read full article on Community Announcements (devotedtoneurosis)AnnouncementsOfficial
A New Monster Available + Stretch Goal Unlocked!
! NEW MONSTER ALERT ! Before we talk about our next stretch goal, I wanted to take a moment to share a really fun addition we've made to the demo over the weekend - there's a brand new monster for you to obtain (just make sure you've updated on Steam) {STEAM_CLAN_IMAGE}/45409460/3021050c03b3a3c1314847d79fd4af9dea7ce867.png What is this strange monster? It can be quite tricky to obtain if you're not a monster expert, however, I'll give you a few hints to set you on the right course. You already know that Laz is what happens when a dark spore infection hits Apo, and that you can purify it. However, if you use a Subtractor Gem, a curious item that undoes fusions, you'll find yourself with a Spore on your team as well... Take the poison-kitten monster Playg and this newfound Spore to the fusion machine, to obtain this new Absolute Fusion. We love monster deep lore and "monster biology" so expect more interesting interactions like this in the completed game! - I have to give a big thanks to everyone that has played our demo and supported Monster Crown Sin Eater on Kickstarter. Thanks to this support, we've not only reached successful funding, but we've smashed two stretch goals - the first, baby monsters was expanded upon in our last update, however, the newest one Customize Your Playthrough is sure to be of interest to all. You can read more about it here: https://www.kickstarter.com/projects/monster-crown/monster-crown-sin-eater-monster-taming-rpg/posts/4353638 {STEAM_CLAN_IMAGE}/45409460/be967fe674b2944f15c29633f5dd70dd7d329b53.png Randomizer/Customizer options have always been thoroughly enjoyed by our fans and we couldn't be more excited to bring them back around again. Even if you aren't sure you have what it takes for challenges, simply customising monsters, colors and typing can make for an amazing fresh playthrough, finding a legendary beast just outside your home at level 4 is always a surreal experience. Thank you all for following along, and be sure to grab t...Read full article on Community Announcements (devotedtoneurosis)






