Metal Arms: Glitch in the System/Clean Up

Any% Easy Route

Clear first wave of the first area with spew (Manage your ammo)
Get Gold washer by going to the far end of the first area in a hole in the wall; requires jumping on two jump pads to get there.
Clear Second wave of the first area with spew (Manage your ammo)
Use Detpack on Tunnel
Exiting the tunnel, turn around and go on Launch Pad for Rocket Launcher
Use Rocket Launcher from the alcove to destroy the mil in the Loader
Use Loader to clear the rest of the wave
Clear the second wave of Area 2( camp the mils that drop down from the garage)
Get Battery
Snipe the next Loader with the rocket launcher from the end of the tunnel
Use loader to clear the rest of the wave
Go Towards Wave 2. Immediately, head back to the other side for another Gold washer which is to the right of your entrance into the third area, behind a building
Clear Wave 2 of the last Area
Use the Shield and (Double Ammo item?) for the boss fight. Use Rocket launcher (Perfect fight is 4 shots I believe)