Here is the full list of all 43 War of the Human Tanks - there are ALTeR achievements.
Completed every achievement in War of the Human Tanks - ALTeR
It's rather cute than scary, though...
Obtained the Orange
Obtained the Nail Clipper
Defeated the strongest gymnastic formation
The crew is back together
For Excellence in Ranged Combat
That'd better be the last one...
Reached the end of illusions
Defeated the Juggernaut of Void
Settled Ruru into her natural inhabitat
Defeated the Illusion System
It's scarier than the enemy...
Learned to Love the Bomb
The lone assassin left no survivors
Good for preventing hostile radiowaves... maybe?
Explored a world of illusion
Let your fists do the talking
Meow?
Defeated the mightiest train of them all
Explored ancient(?) ruins
If only they wore helmets too...
Gotta have all those helmets!
We won't forget your sacrifice
A fourth force has appeared...?
Half Human Tank
Big, Bigger and...?
Enemy technology has been contained
Answer: deep
Together, the two are unstoppable!
It was over before it began
Oh, yeah!
2.0.0.
Completed episode 6 (Alternative)
Completed Episode 8
Completed episode 7
Completed episode 6.5
Completed episode 6
Completed episode 5
Completed episode 4
Completed episode 3
Completed episode 2
Completed episode 1