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