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