Gameplay is largely identical to that of Human Alliance, with up to two players using mounted gun turrets to fire at opponents on screen across four stages.
The Pacific Ocean, Wales and East China stages can be played in any order before moving on to the final stage, The Moon.
New to the game's control interface is the addition of a "Hyperenergy Tech" lever. This can be used to either create a shockwave that damages multiple enemies at once, or to generate a force field to protect the players from enemy attacks.
Players can also push this lever in a specified direction or repeatedly press the start button at predetermined points to complete Action Sequence events and avoid potential damage. The game also includes an achievement system.
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