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One Boss One Fight

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One Boss One Fight

mrTodo · Published by mrTodo · Official site ↗

Mostly Positive — 79% positive (33 reviews) · 12 achievements

Last updated 28 Sept 2026

One Boss One Fight is Action Roguelike game centered around intense Boss battles, multiple heroes, and Viking god powers. Traverse a dark world, build through abilities and constellations, and survive unforgiving encounters.

DJCTQ 10Full Controller Support

£8.50

Lowest price we've ever recorded

View on Steam

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Price history

4 Sept 2026Lowest: £8.50 · Highest: £8.506 Oct 2026

Action, Indie · 2024 · More £5 - £15 games

Embark on thrilling boss fights as you unlock Viking god abilities and craft your hero's path through a dark world.

About this game

One Boss One Fight is an action roguelite built around intense boss battles. You will traverse a dark world, face relentless enemies, and stand against powerful bosses that demand precision and control.

Multiple heroes are available, each with their own playstyle. As you progress, you will encounter Viking Gods and earn their benedictions, shaping your build in meaningful ways. Every decision matters. Every mistake is punished.

This is not about clearing rooms of weak enemies. It's about surviving carefully designed encounters where mechanics evolve, patterns shift, and pressure never drops. The world opens through Expeditions, revealing new Bosses, more Challenges, and new combinations of powers.

Abilities, stars, and constellations enhance your capabilities, allowing deeper builds and long-term progression while keeping each run unpredictable.

Key Features

  • Intense Boss Battles - Multi-phase encounters designed to test positioning, awareness, and execution.

  • Roguelite Challenge - Every encounter is unique, with different builds and evolving threats.

  • Dynamic Progression - Abilities, stars, and constellations strengthen your heroes and expand your strategies.

  • Precision Gameplay - Master timing and movement, or face the consequences.

  • Unforgiving Difficulty - Only the most skilled players will conquer this World.

System Requirements

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Minimum

Minimum:
  • Requires a 64-bit processor and operating system
  • OS: Windows 10
  • Processor: 2.0 Ghz
  • Memory: 2 GB RAM
  • Graphics: Nvidia GTX 970
  • DirectX: Version 11
  • Storage: 4 GB available space

Recommended

Recommended:
  • Requires a 64-bit processor and operating system

Supported Languages

English*, French, Italian, German, Spanish - Spain, Arabic, Bulgarian, Czech, Danish, Dutch, Finnish, Greek, Hungarian, Indonesian, Japanese, Korean, Norwegian, Polish, Portuguese - Portugal, Romanian, Russian, Simplified Chinese, Swedish, Thai, Turkish, Ukrainian, Vietnamese, Portuguese - Brazil, Spanish - Latin America
*languages with full audio support

Latest news

  • Patch NotesOfficial

    2.000 fights already done!

    Version 2.0 - Thank you very much!Two months ago, I launch the biggest project I have ever work on! And now we are crossing 2,000 battles fought in the arena. I couldn't thank you enough!I've also noticed a lot of people found the earlier fights a bit too hard, so I've tuned down (aggressively the first 3 bosses, don't worry there is still plenty of challenge ; and I'm not even talking about hard mode!)Patch 2.5.2MainIncrease enrage timer for all Hard Mode bosses to 16min (Basically when the Executioner spawns)Lower the HP of the Slime Wall in hard mode for Warden DolmarrLower the HP of Prince Marakias normal mode by 60% and now he only has one SkullLower the HP of King Kungar normal mode by 40% and now he only has 2 SkullsLower the HP of Queen Xyra by 25%You can now view per Hero if you have killed a certain boss in Hard Mode (I previously didn’t track this data, so I extrapolated from all your Fights History - issue: if you have cleared your Fights History sadly there is no way for me to track the data back :/)Bug FixThe AoE in challenge mode (Bleed, Poison, Ice) now goes correctly under other effects!The Invulnerability boss bar properly reset
    Read full article on Community Announcements (Todo)
  • Patch NotesOfficial

    Small Fixes and thank you!

    Version 2.0 - Thank you very much!It’s already been a month since One Boss One Fight v2.0 has released!More than 1,000 battles have been fought! I couldn’t thank you enough.Here is the first patch based on your feedback!Patch 2.5.1MainAdded new Discord / Twitch icons to the options menuBug FixThe gathering plant sound kept bugging out even after gathering was completed; it has been removedVeilgates (portal teleport spell) is now constrained to the arena (same as the teleport Stormstep!)Fixed Benedictions with 8 QTE keys not spawningFixed a bug where, in the Overseer fight, the quest objective → Complete X Skull Event would not advanceFixed a quest bug where a quest could increase twice as fast, then bug and keep completing
    Read full article on Community Announcements (Todo)
  • Patch NotesOfficial

    Version 2.0 - The Massive Update Is Live!

    Version 2.0 - The Massive Update Is Live!After one year of development, Version 2.0 of One Boss One Fight is finally here!This is the biggest update the game has ever received, bringing new bosses, exploration zones, a redesigned progression system, and major technical improvements.If you played the original version, this update transforms the experience.👑 6 Bosses to DefeatThe original game had one boss and one arena. Version 2 now features:6 unique bosses6 arenas6 large exploration zones with a new exploration systemand more challenges...!Each boss introduces new mechanics and challenges to overcome.⚙️ Gameplay ImprovementsThis update reworks many core systems to make fights more dynamic and impactful. Every part of the game has been touched in this update.Improved Benediction SystemCompletely redesigned progressionNew ways to grow strongerNumerous balance improvementsMany visual upgrades🎨 New Artwork & DesignThe original cover artwork for the game was created by me… and let's just say it wasn't great 😅For this update I hired a professional artist, and it turned out to be one of the best decisions for the project. The new artwork truly elevates the game and I’m incredibly proud when looking at the Steam page now. Definitely a lesson well learned!⚔️ Jump Back Into the ArenaIf you already own One Boss One Fight, now is the perfect time to return and experience this Version 2.And if you're discovering the game for the first time… the arena awaits!Good luck!
    Read full article on Community Announcements (Todo)
  • AnnouncementsOfficial

    Try out the new version!

    One Boss One Fight \ was released in November last year, and after some amazing feedback, I could see it becoming even better. So I decided to spend some time improving it. But after a few weeks of working on multiple things, I realized I could really step up the game!So I spent most of my time this year rebuilding every system, visual, and bit of game feel to create a truly full and complete multiple-boss-fight experience!The game has now reached a fully playable, somewhat balanced stage. Not all the content is available yet, but there’s more than enough to have a lot of fun!I’m looking for people who would like to help me test the game on multiple levels:First and foremost, did you have fun?Was it too easy? Too hard?Was everything clear and understandable?…How to test the game!Right click the game in your Library → Properties → BetasSelect the \ version and voilà!Thank you very much for reading this far !N.B. : A few notes for the people testingOnly english translation is available at this testing phaseThe gamepad is not fully supported on this new version…. yet :)Windows onlyIf you want to participate more actively I have a discord → https://onebossonefight.com/
    Read full article on Community Announcements (Todo)
  • Patch NotesOfficial

    Future Content Update!

    {STEAM_CLAN_IMAGE}/45058166/3a60862d44dbfc26326604013f85502bf345dc0e.png Thank You for an Incredible Launch! BUG NOTICE : If you encounter annoying bugs either solo or in the multiplayer don't hesitate to jump on the discord. My goal is to fix them as soon as possible. So having your logs files can really help me improve the experience! Thank you guys! Hello everyone! A quick update on the next big free update, it’s coming as soon as possible! I'm working as fast as I can, but I’ve been adding more than I originally planned, which is why it’s taking a bit longer. Here’s what’s changing in a few words. Right now, when you defeat a MiniBoss, a Benediction Stone drops from the sky. That’s going away! Instead, to unlock Benedictions, you'll need to embark on expeditions, gather resources, and rebuild a temple to invoke the gods. What’s coming in the update? ✔️ (80%) Expedition system with randomly generated maps ✔️ (50%) New, tougher MiniBosses found in expeditions ✔️ (100%) Complete combat system rework—better and more interesting creatures ✔️ (100%) 5 Professions: Mining, Chopping, Gathering, Digging, and Skinning (with multi-level resources) ✔️ (75%) A brand-new class: The Archer ✔️ (10%) A rework of spells to better fit the theme + new spells! ✔️ (0%) A new temple in fights to call upon the gods ✔️ (100%) A dedicated area for professions + improving favor with each god ✔️ (100%) A new way to upgrade and enhance your potions ✔️ (100%) A cooking system to prepare food using the meat gathered in expeditions I can’t wait for you all to experience these changes! Stay tuned for more updates. 🚀 Here is a glimpse of what I'm working on! March is going to be a great month! For more details, don't forget to join the discord join the discord. See you in the arena! Benjamin ----------------- 亲爱的玩家们, 我刚刚发现我使用的 Unity 多人服务在中国无法运行,这就是游戏无法联网的原因。对此我深感抱歉!🙏 我会尽快研究解决方案,看看如何修复这个问题。 感谢大家的支持和耐心!❤️ — Benjamin {STEAM_CLAN_IMAGE}/45058166/3a60862d44dbfc26326604013f85502bf345dc0e.png
    Read full article on Community Announcements (Todo)

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