Mech Crusade is a 90's-inspired mech simulator set in the post-apocalyptic land of 2199 Merica. You have a choice of multiple different mechs, weapons, and branching, nonlinear missions. Take contracts. Blow things up. Rake in the moolah.
The Swiss Confederation, the world hegemon, has hired you to stir chaos in the wild and untamed land of Merica before they begin their "expedition." Thankfully, the nations in the region all have bitter hatred towards each other, massive internal inconsistencies, and are generally backwards. They include the totalitarian, rapidly modernizing Amish state, the corrupt and decadent Kingdom of Bec, and The Donut, a city-state controlled by the insane Cult of Q. Should be easy pickings.