Single-Instruction (Subleq) Programming Game
"Zachlike" single-instruction programming game
Single-Instruction (Subleq) Programming Game launched on July 30, 2023 with 86 votes, #960 of 4,347 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
Single-Instruction (Subleq) Programming Game is an educational game where players learn to program using only one instruction: subtract and branch if less than or equal to zero. Designed for anyone interested in computer science fundamentals, it teaches how complex programs can be built from minimal operations. The game makes abstract programming concepts concrete and interactive, offering a hands-on introduction to low-level computing principles and assembly language logic.
written from the facts on this page · September 2026
From the sources
SIC-1 is a free single-instruction (subleq) programming game. Neglect your personal life in pursuit of promotions and vague assurances of job security! Optimize your programs to rise to the top of the leaderboards! SIC Systems thanks you for your hard work! Now please return to your desk. It's an assembly language zachlike for everyone! New programmers will appreciate how few unique instructions there are to learn (just one!), and experienced programmers will appreciate how poorly suited this one instruction is for writing straight-forward programs. That was a really good game! Last level felt appropriately cool. (It was the only one where I didn't immediately have an idea for how to…from jaredkrinke.itch.io
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