Several months after a devastating war that left much of Earth destroyed, the Earth Defense Force faces new challenges when a pirate vessel breaks Citadel law and opens several Mass Relays. HFY?

When a Mass Relay long dormant goes active, a young race's defenses will soon be tested. When aliens eventually come knocking on their doors, they shall stand for all of mankind. For all of humanity, they shall be the first and last line of defense, for this is the dawn of the Earth Defense Force! (Rated M for violence, language, and other such examples found in M rated titles.)

With the Ravagers defeated once and for all, the Earth Defense Force spreads outwards from earth and become the Alliance Defense Force as they prepare for any and all threats to humanity. Whether the enemy is overzealous turians, slavers or giant sentient dreadnoughts, the ADF will take them all on with big guns, ships, bipedal mechs, giants insects and dragons.