Orc's Pain

The mighty orc. How did he come to be?

Orcs came and destroyed the Earth.
They ravaged and looted. 
They made a mockery of humanity and all it's accomplishments. 

But why and how did they leave Protheka and come to Earth?

Follow the original orcs of Protheka as they fled the dark elves. 
See how they came upon the portal that would bring them to Earth.

Watch as they realized the world was for the taking. 
Now the only question is...

What and who will they take first?