Trenched has you fight as part of the Mobile Trench Brigade and it is your job to fend off an invasion by Monovision, an alien race hell bent on colonizing earth, using a variety of highly customizable mechs.

Players are introduced to Takezou Nishimura, a ninja-samurai who is rejected by both sides of his parents' heritage, along with his spunky sidekicks who each play an integral role in his journey of discovery.