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