Get enemies to kill each other 50 times.

Total a car by flipping it over.

Clear "BAD GROUND."

Clear "YEARN FOR REFUGE."

Fully upgrade one weapon category.

Destroy all of the Spider's legs.

Get onto the Grand Lancer's head.

Clear the giant slide.

Purchase nanomachines for a teammate.

Clear the swimming stage.

Destroy the V2 rocket

Wipe out the Elite Russian Sniper Team from the rooftops

Resuscitate your partner in coop 10 times