Here is the full list of all 25 Z achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Mobile Missile, why fire one when you can fire three?
Single player game completed
City World conquered
Heavy Tanks are slow but very powerful
Double Missile Launchers are an awesome defence against everything.
Lasers can cut through anything
Howitzer: Strong defence against all attackers
Pyros burn and burn some more
A.P.C. is a deadly Troop Transport
Jungle World conquered
Medium Tanks are great all purpose vehicle
Build a Sniper, runs fast and shoots from a long range
Arctic World conquered
Gun Turret: Defence against light armour
100 Territories captured
Build a Tough and launch a deadly rocket attack
Volcanic World conquered
Build a Psycho, good fighters capable of rapid firing
Light Tanks are fast and deadly. Avoid big guns
Desert World conquered
Gattling gun use this against infantry
Jeep are fast moving but easy to kill
10 Territories have been captured
Completed a battle without any losses
Built a Grunt, grab those grenades