FORK BOMBA programming game where your code copies itself.

Fork Bomb is a single-player programming game for Windows on Steam. You write code for one machine that can build copies of itself, and every copy runs the same program. The challenge is making that one program keep working when hundreds of machines run it at once.

No. Fork Bomb teaches the basics from scratch. Eleven guided lessons introduce one idea each, and every lesson starts from working code you edit rather than a blank file. Errors are explained in plain English and point at the line. The later scenarios are hard.

Fork Bomb is a game, not a course, but it is designed so that people who have never programmed can play it. Its eleven lessons teach a small Python-like language one idea at a time, starting from working code, and the 39 scenarios after them turn loops, conditions, functions and shared resources into puzzles.

Fork Bomb uses a small language that looks and reads like Python: indentation, while and for loops, if/elif/else, functions, lists and dicts. Seventeen machine functions such as move(), mine(), sense() and spawn() unlock as you progress, and the editor has print(), autocomplete and optional vim keybindings.

Fork Bomb is in the same family of programming games as The Farmer Was Replaced and Bitburner, and like The Farmer Was Replaced it uses a Python-like language. The difference is that in Fork Bomb your code runs on a swarm: every machine you spawn runs the same program, so the hard problems are contention, crowding and per-tick instruction budgets rather than a single agent's route.

Programming games often mentioned alongside Fork Bomb include The Farmer Was Replaced, Bitburner, Screeps and the Zachtronics games. Fork Bomb shares a Python-like language with The Farmer Was Replaced, a colony run by code with Screeps, and scored optimization puzzles with the Zachtronics games, in a single-player game where one program controls every machine.

Fork Bomb costs $9.99 USD on Steam for Windows. It has been in Early Access since 2 October 2026 and supports Steam Cloud saves and 23 Steam achievements.

Fork Bomb takes roughly fifteen to thirty hours to see all 11 lessons and 39 scenarios, and considerably more if you chase three stars on every level. There is also a sandbox and a daily challenge.

Fork Bomb runs a deterministic simulation, so the same code always gives the same result. Each solution is scored on ticks, instructions, lines of code and energy.