DOOMATH: When DOOM Meets Arithmetic
– A Math FPS Built in C with Raylib
There’s a new kind of FPS in town, and it doesn’t just test your aim—it tests your arithmetic.
Meet DOOMATH: a first-person math shooter where reloading your weapon requires solving arithmetic problems under fire.
Solve fast. Kill faster.
The Concept
DOOMATH is a DOOM-inspired arena FPS built from the ground up in C using raylib. You fight waves of enemies across four themed levels—Lab, Sewer, Fortress, and the Final Depths—each with unique textures and a boss encounter.
The twist? Every time you hit R to reload, the game throws a math problem at you: addition, subtraction, multiplication, or division. And you can’t fire again until you solve it correctly.
Miss the math? You’re dead.
Gameplay Highlights
Level 1: The Math Lab – Addition problems gate your reloads. The dino-blob enemies seem harmless. They are not.
Level 2 Boss Fight – Solve subtraction problems while a horde closes in and the boss eats your health bar.
Features
Math-gated reloading – difficulty scales with wave progression
5 weapons – Pistol, Triple Shot, Shotgun, Rapid Fire, Rocket Launcher
4 themed levels – unique floor/wall/ceiling textures and bosses
Wave-based combat – survive timed waves with increasing enemy count and speed
Particle system – muzzle flash, explosions, hit markers
Floating damage numbers
Difficulty scaling – Easy (1 wave + boss), Normal/Hard (3 waves per level)
Screen shake and kill streaks
Arcade speed mode
Controls
KeyActionWASDMoveMouseLookLeft ClickFireRReload (solve a math problem)1-5Switch weaponPPauseHHelp
Building from Source
Requirements: Linux, raylib 4.5 or later, GCC, raylib development headers.
bash
git clone https://github.com/moderatedan/DOOMATH.git
cd DOOMATH
./build.sh
./doomathProject Structure
text
doomath.c Main game source
build.sh Build script
include/ Header files (core/, audio/)
src/ Module sources (core/, audio/)
textures/ Per-level PNGs
resources/ Audio assets
media/ Screenshots and cover artTech Stack
C – 87.4%
Python – 11.7% (texture generation)
Shell – 0.9%
Status & Credits
v4.1 – Active development. Bug reports and feedback welcome via GitHub Issues.
Game design and code: Daniel Brummitt (@moderatedan)
Built with: raylib by Ramon Santamaria
License: MIT
Note: Music is not included in this repository. The game runs without music files. Music licensing for the official release is in progress.
Final Thoughts
DOOMATH is a brilliant example of how game mechanics can turn “boring” subjects into adrenaline-pumping action. It’s part educational, part chaotic shooter, and entirely creative. If you’ve ever wanted to practice mental math while dodging pixel-art demons, this is your game.
Check it out on GitHub: github.com/moderatedan/DOOMATH
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