The game is set in a world called Acheron, where the player takes the role of an Imperial Commander and his/her job is to defend the Empire from Raiders, Bloodthirsty, Xenos, and the Righteous.
This game provides examples of:
- Boss Battle: The Epic Bosses in War Metal, in Tyrant the Raids.
- Crapsack World: Acheron.
- The Corruption: The Blight mutates anything into Bloodthirsty.
- Green Rocks: Neocyte.
- Knight Templar: The Righteous seek to purify Acheron from its corruption, and their willing to kill everyone who gets in their way.
- Scary Dogmatic Aliens: The Xenos invade Acheron for its resources. Their forces include fleets of alien spacecraft, hosts of monstrous creations, and armies of Xeno troopers.