Install

Windows

Step 1 — Open PowerShell

Press Win + R, type powershell, and press Enter. Or right-click the Start button → Windows PowerShell.

Step 2 — Paste this command

iwr -useb https://mostlymodular.gg/install.ps1 | iex

Step 3 — If Windows asks about execution policy

Type Y and press Enter to allow the script to run. This is a one-time prompt.

Step 4 — Open a new terminal window

After install completes, open a fresh PowerShell window so the PATH update takes effect, then verify your install:

mm doctor

✅ No admin required. Installs to %USERPROFILE%.mmbin and adds itself to your PATH automatically.

Prefer to download manually? Download the Windows zip and extract it anywhere — just add the folder to your PATH.

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Linux / macOS

Step 1 — Open a terminal

Open your terminal app (Terminal, iTerm, GNOME Terminal, etc.).

Step 2 — Run the installer

curl -fsSL https://mostlymodular.gg/install.sh | bash

The installer downloads pre-built binaries — no Rust or build tools required. Installs to ~/.mm/bin and updates your shell profile automatically.

Step 3 — Reload your shell

Either open a new terminal window, or run:

source ~/.bashrc   # bash
source ~/.zshrc    # zsh

Step 4 — Verify

mm doctor

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What’s next?

mm init my-game       # create your first game
mm plugin new hello   # write your first plugin
mm run                # run it

Need help? Check the Getting Started guide or the full documentation.