| The Entire Flood = Headcrabs. Zombies and everything. Even have Carrier tank things that spawn more headcrabs and, before you kill it in half life one, a giant talking flesh-thing just like the gravemind. AND, headcrabs aren't even the full Xen race.
In addition, the Coveant are just the Pf'hor from Bungies previous shooter Marathon, except, nonreligious.
The concept of Forerunners obviously isn't original in the least, but in Marathon theres a race called the Jjaro who are the exact same thing. |