The mutants are now lead by the evil Xi-Tiger who had turned them to terrorism, and one of their goals is to kill Epsilon-Eagle…
At the start of the game the player chooses four out of six weapons – each with special advantages or disadvantages against certain enemies. As mutant Epsilon-Eagle also has other special powers, e.g. teleporting across the screen or (with full health) morphing into a powerful phoenix destroying everything in his way.
The 25 levels consist of short side-scrolling sequences and a few boss fights. In fact the bosses take on the majority of the game and the side-scrolling sequences are mostly used to give the player opportunity to collect ammo boxes. Bosses have their own patterns and weaknesses.
Epsilon-Eagle can run, double jump, hover in the air, and use six different types of weapons. Only four can be equipped at any given time, but the player may choose which weapons they would like to equip before the game starts. Each gun has its own ammunition bar which can be replenished; if it’s depleted the player will be left with a little firepower.
The player can also perform a dash across the screen, which when at full health, will become a deadly move called “Phoenix Force” that will damage any enemies in its path. There is also a counter move, that if timed properly, will change enemy bullets into health.
Epsilon-Eagle can attack in either fixed-fire or free-moving styles. The first makes him immovable while firing a weapon, instead allowing for quick aiming, while the second allows walking and shooting simultaneously with the sacrifice of directional accuracy.