How can humanity survive in a perilous wasteland overrun by rampaging mechanized beasts?

Our once flourishing world was annihilated by colossal mechanized beasts, causing humans to be displaced wherever these beasts roamed.

For centuries, this world has been plagued by wars and massacres, until you, a valiant commander emerges. You will lead the survivors to capture and modify beasts, train troops, form alliances, and ultimately save humanity's last remaining enclaves.