The Tank Crusher is a promotional unit released April 10-April 15, 2014. There is a special mission that allows you to try it out.
The first attack, Vehicle Crush only hits vehicle units, much like the Brutalizer, except with less damage traded for extra range and armor piercing.
The second attack, 21 Ton Collision affects a large portion of the map and gets a guaranteed critical hit against vehicles(105%). This attack also hits soldiers and may land a critical hit every once in a while.
The third and final attack, Rocket Assault is able to hit any unit on the field. However, it cannot land critical hits on soldiers, critters and aircraft. This attack can be used to strip the armor off of a tank or vehicle to make them vulnerable to more attacks.
I mean seriously, Floyd, a recycling program? Do you think I'd be caught dead driving a USED tank?
Crush Old Vehicles with TANK CRUSHERS
Reward:
1,000
Dialogue
Start mission
These old, broken down military vehicles are an eyesore. They're piling up on the roads, behind the factory, behind MY HOUSE. If we don't do something about them, how am I supposed to enjoy the view from my terrace with my morning coffee? My hypothetical terrace, I mean, that I'm going to build from scraps of Perkin's bunk.
We could set up a recycling campaign to properly dispose of retired military vehicles.
Or we could crush 'em with the monster trucks I built? I call it "TANK CRUSHER."
I'm going with Zoey's idea just because it sounds like, waaay cooler?
Finish mission
Zoey, I've never been prouder of you. This must be what it feels like to be in heaven.
Your idea of heaven is watching vehicles being crushed under giant tires?
Perkins, don't you have some type of.. demeaning work to do?
I'll get right on that… sir.
Zoey, I'm going to need like, a thousand more of these.
Reward screen
I may be crying. But from happiness. Happy tears.
Trivia
This unit is the first to have a nanopod price not rounded to a multiple of 5.
Apparently to save file space Z2 simply switched the chassis alone to make it's front and back profile, leaving the wheels treads facing the player regardless if you are seeing it's front or back.