Sign up for a free Gunbound account. You can sign up on the Softnyx website by clicking on the "Registration" link on the home page.

Download the Gunbound International Service (GIS) client here.

Gunbound is free to play, with free avatars that you can buy with gold that you earn in games, and avatars that you can only buy using Gunbound Cash. You can buy Gunbound Cash on mobiusonline using your mobiusonline account.

Take note that you will need a mobiusonline account to be able to buy Gunbound Cash. Sign up for a FREE mobiusonline account here.