First, download the installation MSI from here.
Then, run and choose your instillation directory and options.
Once installed, double click the Project Altis Launcher shortcut that will be on your Desktop
Login to the launcher as usual, and wait for any patches to complete.
Once all patches are installed, hit the Play button on the launcher and hop right into the action!
Project Altis will not support any OSX Build until Beta. Sorry about that!
Project Altis will not support any Linux Distro until Beta. Sorry about that!