Steam

Wheel Boy
Wheel boys are the basic, melee unit. It is best used for attacking as its defenses are low.

Spider Gunner
The spider gunner is a basic, ranged unit. It is a well rounded unit with no specific weaknesses.

Fly Guy
Fly guy is a basic, flying unit. The shark missile in its hands will punch through any defense.

Defender
The defender is a bulky, melee unit. It had the ability to knock unfortified enemies back.

Engineer
The engineer is a ranged support unit. She can build radar systems to assist other ranged units.

Kryton Warlord
The Kryton Warlord is a melee heavy land unit. Its attack increases each time it takes damage before feasting on it to regain health once it destroys an enemy.

Steam Tank
The steam tank is a ranged heavy land unit. It has powerful ranged damage as long as it doesn't move, but can attack after moving with much reduced effect and range. It is unable to attack air units.

Aerial Warship
The aerial warship is a ranged air unit. It comes equipped with the charged cannon capable of high area damage. It cannot attack air units.

Wartress
The Wartress is a ranged heavy land unit. A moving castle that brings terror to the field battle.