As a Guardian you are part of an elite unit responsible for protecting the federation while they extract a newly discovered and mysterious new energy source, perovskite, a red and very powerful mineral that only grows in the outer rim of the galaxy. In addition to their powerful arsenal, Guardians can also instantly summon and control defensive structures and units to help them fight invading armies. The game has a single player campaign and multi player PVP and PVE-Coop modes. It also comes with a full-blown level editor that you can use to create your maps from scratch. You can play alone in the editor, or with friends in co-op design sessions.