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Fatal Theory

Game overview

Fatal Theory

Fatal Theory is nostalgic beat-em-up action with a fresh twist of ENDLESS AERIAL RAVE COMBOS and a killer illustrated story. Exercise your carnage muscle by smashing through huge hordes of unlovable fiends and take your crummy city back from the forces of hell!

Indie Action Casual RPG Beat 'em up
Last tracked players
0
All-time peak
Unavailable
24-hour change
Unavailable
Steam reviews
81.3% positive
16 reviews · via SteamSpy

Delayed observation · last tracked . Values marked unavailable are not estimated.

About this game Read the full description
Fatal Theory is nostalgic beat-em-up action with a fresh twist of ENDLESS AERIAL RAVE COMBOS and a killer illustrated story. Exercise your carnage muscle by smashing through huge hordes of unlovable fiends, meet a bizarre cast of characters (and subsequently slay a good 90% of them in wicked boss battles) and take your crummy city back from the forces of hell!

Chunky retro pixels: check.
Tight, fluid controls: check.
Combat cranked to 11: check.
Story that makes the writer want to drink until he forgets: check!

The Story

You play as Nick Mayhem, who has just had his night RUDELY INTERRUPTED by news of the dead walking the streets and doesn't think twice before picking up a baseball bat and taking the fray head on! Soon Nick will find himself tangled up with screwy demon generals and their armies of hell, fighting his way to the head honcho with only a judgemental talking sword for guidance.


Can Nick Mayhem save his city from destruction?

Will he find love in a city mid-apocalypse?!?

The Game


Wreak havoc through huge waves of enemies and 9 nifty boss battles. Execute chaotic special attacks by filling your rage bar and pulling off Street Fighter-esque button combinations. String together big combos and be rewarded with a big damage multiplier. Unlock 6 weapons and level them up to gain new special attacks to wreck fools with. Make cold cash by completing levels, spend it pumping up Nick's stats to get stronger. Do it all while enjoying an off-beat, darkly humorous story illustrated in cool comic book style.

The Features

  • Fully illustrated, darkly humorous story mode
  • Power up! Find new weapons, level them up to unlock devastating new special attacks, and pump up Nick's stats at the shop.
  • Local multiplayer: co-op in arcade mode or duke it out in versus, with gamepad support for 1-2 controllers.
  • Survival mode - destroy all comers, forever!
  • Mod friendly: literally everything in the game can be reskinned.

The Heart


Fatal Theory is a game crafted with love by two brothers who tried to make a simple 2D fighting game and got completely carried away. Matt coded the entire engine and game from scratch, did the bulk of the character animations, and illustrated the story. Adam wrote the dialogue, filled in the background art with life and detail, did the other portion of character animations and generally spit-shined things. The game has been in on-and-off development and various states of release for years, but we're proud to say this is the best version yet.

Player activity

Concurrent players over the last 48 hours.

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Fatal Theory joins the Steam Halloween Sale! Patch 1 Live! Updates and Fixes Ahoy!
System requirements Windows · macOS · Linux

Windows

Minimum

Minimum:
  • OS *: Windows Vista
  • Processor: Intel Atom N455 / 1.66 GHz
  • Memory: 1 GB RAM
  • Graphics: Any
  • Storage: 400 MB available space

macOS

Minimum

Minimum:
  • OS: 10.6
  • Processor: Intel Atom N455 / 1.66 GHz
  • Memory: 1 GB RAM
  • Graphics: Any
  • Storage: 400 MB available space

Linux

Minimum

Minimum:
  • OS: Ubuntu or SteamOS
  • Processor: Intel Atom N455 / 1.66 GHz
  • Memory: 1 GB RAM
  • Graphics: Any
  • Storage: 400 MB available space
Game details Languages, features & support
Publisher
2 Hit Studio
Achievements
21
Controller support
partial
Features
Single-player, Multi-player, Co-op, Shared/Split Screen Co-op, Shared/Split Screen, Steam Achievements, Partial Controller Support, Remote Play Together, Family Sharing
Languages
English
Compatibility & accessibility Steam Deck, controllers & access features

Can I Play This?

Steam declarations and Valve's Steam Deck compatibility result. Missing data is shown as unknown, never unsupported.

Sources fresh
Native Steam builds
Windows: unknown
macOS: unknown
Linux: unknown
Steam Deck
unsupported
Valve compatibility test
Input
Controller support: unknown
Structured language support (1)
LanguageInterfaceFull audioSubtitles
EnglishYesNoNo
Steam store page fresh · checked 2026-10-06 PCGamingWiki technical notes External link only; SteamIQHQ does not ingest PCGamingWiki content.
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Developer Analytics

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Frequently Asked Questions

Is Fatal Theory free to play?
Yes, Fatal Theory is free to play on Steam.
What genre is Fatal Theory?
Fatal Theory is a Action, Casual, Indie, RPG game.
Who developed Fatal Theory?
Fatal Theory was developed by 2 Hit Studio and published by 2 Hit Studio.
What platforms does Fatal Theory support?
Available on Steam for Windows, macOS, Linux.

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