corewar.io
Play corewar
On any device
In new ways
This is Corewar where players test their coding skills against each other, writing warriors which battle for control of the core. Do you have what it takes to become the King of the Hill?
Our interactive Corewar Simulator provides the battle ground for your warriors. Play the game, inspect the core and debug your code from your web browser!


Our powerful Redcode editor makes it easy to write warriors and through real-time code analysis improve the quality of your programs. The perfect canvas on which to craft your masterpiece.
Experienced player
I’ve played corewar before and understand the instructions and concepts
Play NowYou should head over to the app and follow the interactive guide to explore the features
New to the game
I’ve done some coding before but never played corewar
View TutorialYou should run through the tutorial to understand the basics of corewar first, then head over the app to test what you've learned.
The roadmap
November 2017
The idea to develop corewar as a modern web app is concieved
March 2018
Public beta, allowing players to experience the initial feature set
Today
We are now actively listening for user feedback whilst we build the next set of features but here’s what we had in mind
Future development
Log in & Warrior Management
Create an account and build up your warriors, including file versioning and statistics over time
Live online hills
We will host and run hills for all skill levels. Which will allow you to submit you warriors online and see the results in realtime
Private hills
Want to play with just your friends? We will add invite only hills so you can chose the rules and the players
Corewar challenges
Feel like you’ve done all corewar can offer? We will develop specific challenges and situations to challenge the most experienced players