NandGame
Build a working computer step by step from NAND gates
NandGame asks you to build a computer from scratch, starting with a single NAND logic gate. Each level is a small puzzle. You wire gates together to make a new part, such as AND, OR and XOR gates, then adders, an ALU, registers and a control unit, and finally a working processor.
Free · No login · Browser · Beginner
About NandGame
You do not need any prior knowledge of computer architecture, and the math stays at addition and subtraction. It suits curious beginners as well as programmers who want to see how a CPU works inside.
The game is free and runs in the browser. Each task is set like a quiz: you get a goal and must build a circuit that meets it.
On Breakpoint since 23 Oct 2026.