Choose your desired install location, please note that game files must not be moved after install.Extract the contents of the zip file (h2pc_installer_1.8.1.zip) and run h2pc_setup_1.8.1.exe.If you have trouble installing your purchased game, you can ask for help in our Discord server.After a successful install, you may then run the Cartographer mod installer. Please purchase the game, and install it.
If you have Halo 2 installed, all you need to do is run the Cartographer mod installer, verify install location, then run Halo 2 and create your account in-game.