Compare Cellyon: Boss Confrontation prices across 50+ stores and find the best deal. Developed by Sentry Games. Published by Sentry Games. Released on 10/11/2022. Available on PC. Genres: Action, Indie, RPG, Strategy.

Strip out all the MMORPG filler and keep only the boss fight: that is the entire pitch, and for a small indie it lands harder than you might expect.

I have a spreadsheet tab dedicated to games that try to isolate one mechanic and build everything around it, and Cellyon: Boss Confrontation sits in a very short column labelled 'actually commits to the concept.' The premise here is surgical: no open world, no gear treadmill, no hour-long commute to the raid entrance. You queue from a lobby, load directly into a boss arena, and the fight lasts somewhere between five and ten minutes. That is the loop, every time. For strategy-minded players who love MMORPG raid design but despise the fifty hours of mandatory farming that gate it, this is the version of that fantasy you never knew you could have. The mechanical foundation runs on a tab-targeting system that veterans of older MMOs will clock immediately. You are not aiming manually; you select a target and your spells resolve automatically, which shifts the cognitive load entirely onto decision-making rather than twitch precision. Before each fight you lock in a loadout of six spells drawn from a wider pool, and this is where the interesting thinking actually happens. The spell selection covers a full spectrum from tanking cooldowns to healing throughput to damage rotations, and the game actively encourages hybrid builds rather than forcing strict class roles. Solo play is supported, which matters, but the design clearly breathes better in four-player co-op where pre-fight build negotiation becomes its own strategic layer. There is also a competitive 'The Rift' mode where two groups race the same boss simultaneously, with a 'Trance' ability letting you reach into the opposing team's universe to drop traps and obstacles, which is a genuinely clever wrinkle on top of the co-op foundation. The content ceiling is the honest concern here. The base game ships with around ten co-op bosses, and that roster is thin for anyone chasing long-term variety. The mitigation is Boss Maker, a full level-editor tool that ships alongside the game, giving players control over boss objectives, movement patterns, health values, add spawns, and even custom class design from scratch. The Steam Workshop integration means community-built fights extend the pool meaningfully, though the size of that community is small enough to be a real caveat. SteamDB data shows a near-zero concurrent player count at time of writing, and a forum thread from mid-2025 is asking whether servers are still online. That is the uncomfortable reality: Sentry Games has moved on to new projects, the studio itself has confirmed a 'Sunset Update' as the game's final major patch, and matchmaking with strangers is effectively dead. You are bringing your own group or you are going solo. With that player-count warning front and centre, the calculus changes but does not collapse entirely. The expedition mode, added at 1.0 launch, generates randomised boss sequences with configurable difficulty and optional affixes that force improvised strategy on each run, which gives the solo or small-group experience real replay legs if you are willing to chase harder difficulties. The steampunk-adjacent art direction holds up, the tab-targeting feels snappy rather than antiquated, and the Boss Maker is genuinely one of the more generous mod tools in this budget tier. Think of it less like a live-service co-op game and more like a contained puzzle box designed for a committed group of two to four friends who want raid-style coordination without the WoW subscription. Diego, Scout Team

Cellyon: Boss Confrontation
ActionIndieRPGStrategy

Cellyon: Boss Confrontation

Oct 11, 2022Sentry Games
GamerScout Says

Strip out all the MMORPG filler and keep only the boss fight: that is the entire pitch, and for a small indie it lands harder than you might expect.

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Screenshots & Media

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About Cellyon: Boss Confrontation

I have a spreadsheet tab dedicated to games that try to isolate one mechanic and build everything around it, and Cellyon: Boss Confrontation sits in a very short column labelled 'actually commits to the concept.' The premise here is surgical: no open world, no gear treadmill, no hour-long commute to the raid entrance. You queue from a lobby, load directly into a boss arena, and the fight lasts somewhere between five and ten minutes. That is the loop, every time. For strategy-minded players who love MMORPG raid design but despise the fifty hours of mandatory farming that gate it, this is the version of that fantasy you never knew you could have. The mechanical foundation runs on a tab-targeting system that veterans of older MMOs will clock immediately. You are not aiming manually; you select a target and your spells resolve automatically, which shifts the cognitive load entirely onto decision-making rather than twitch precision. Before each fight you lock in a loadout of six spells drawn from a wider pool, and this is where the interesting thinking actually happens. The spell selection covers a full spectrum from tanking cooldowns to healing throughput to damage rotations, and the game actively encourages hybrid builds rather than forcing strict class roles. Solo play is supported, which matters, but the design clearly breathes better in four-player co-op where pre-fight build negotiation becomes its own strategic layer. There is also a competitive 'The Rift' mode where two groups race the same boss simultaneously, with a 'Trance' ability letting you reach into the opposing team's universe to drop traps and obstacles, which is a genuinely clever wrinkle on top of the co-op foundation. The content ceiling is the honest concern here. The base game ships with around ten co-op bosses, and that roster is thin for anyone chasing long-term variety. The mitigation is Boss Maker, a full level-editor tool that ships alongside the game, giving players control over boss objectives, movement patterns, health values, add spawns, and even custom class design from scratch. The Steam Workshop integration means community-built fights extend the pool meaningfully, though the size of that community is small enough to be a real caveat. SteamDB data shows a near-zero concurrent player count at time of writing, and a forum thread from mid-2025 is asking whether servers are still online. That is the uncomfortable reality: Sentry Games has moved on to new projects, the studio itself has confirmed a 'Sunset Update' as the game's final major patch, and matchmaking with strangers is effectively dead. You are bringing your own group or you are going solo. With that player-count warning front and centre, the calculus changes but does not collapse entirely. The expedition mode, added at 1.0 launch, generates randomised boss sequences with configurable difficulty and optional affixes that force improvised strategy on each run, which gives the solo or small-group experience real replay legs if you are willing to chase harder difficulties. The steampunk-adjacent art direction holds up, the tab-targeting feels snappy rather than antiquated, and the Boss Maker is genuinely one of the more generous mod tools in this budget tier. Think of it less like a live-service co-op game and more like a contained puzzle box designed for a committed group of two to four friends who want raid-style coordination without the WoW subscription. Diego, Scout Team

Tags

singleplayermultiplayercooponline-coopworkshopcloud-savestier:sub-5Boss RushTab-TargetingRaid MechanicsSpell LoadoutExpedition ModeLevel EditorHybrid BuildsSunset TitleSmall-Group Co-op

System Requirements

Minimum

OS
64-bit Windows 10
Memory
8 GB RAM
DirectX
Version 11
Network
Broadband Internet connection
Storage
10 GB available space
Graphics
NVIDIA GeForce GTX 10xx series or AMD RX 400 or 500 series
Processor
Intel / AMD (4-core) @ 2.2 GHz

Recommended

OS
64-bit Windows 10
Memory
16 GB RAM
DirectX
Version 11
Network
Broadband Internet connection
Storage
10 GB available space
Graphics
NVIDIA GeForce RTX 20xx series or AMD RX Vega series
Processor
Intel / AMD (4-core) @ 3.00GHz

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Game Info

Developer
Sentry Games
Publisher
Sentry Games
Release Date
Oct 11, 2022

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Price History

2026-06-101.00(lowest)
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How much does Cellyon: Boss Confrontation cost?

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What platforms is Cellyon: Boss Confrontation available on?

Cellyon: Boss Confrontation is available on PC.

When was Cellyon: Boss Confrontation released?

Cellyon: Boss Confrontation was released on 11 October 2022.

Who developed Cellyon: Boss Confrontation?

Cellyon: Boss Confrontation was developed by Sentry Games.