Free Russia from the alien menace

Liberate Russia on Hard difficulty

Free Saudi Arabia from the alien menace

Liberate Saudi Arabia on Hard difficulty

Free France from the alien menace

Liberate France on Hard difficulty

Free North America from the alien menace

Liberate North America on Hard difficulty

Free Japan from the alien menace

Liberate Japan on Hard difficulty

Complete the hidden zone and obtain the good ending

Complete all zones on Hard difficulty

Rescue all prisoners in Russia

Rescue all prisoners in Saudi Arabia

Rescue all prisoners in France

Rescue all prisoners in North America

Rescue all prisoners in Japan

Enter Zombie Mode, Energia Mode, and Schizo Mode in the same zone

Obtain all gun upgrades

Obtain all missile upgrades

Obtain all special weapon upgrades

Obtain all upgrades

Defeat Black Knight in any standard zone

Enter a high score of over 50,000

Defeat Raptor in Russia

Defeat Dwarf in Russia

Defeat Dedlock in Russia

Defeat Qualm in Saudi Arabia

Defeat Sentinel in Saudi Arabia

Defeat Prowl in Saudi Arabia

Defeat Scorch in France

Defeat Buzzsaw in France

Defeat Arachan in France

Defeat Carapace in France

Defeat Behemoth in France

Defeat Thunderfoot in North America

Defeat Granite in North America

Defeat Reflex in North America

Defeat Fireball in North America

Defeat Colossus in Japan

Defeat Claw in Japan

Defeat Arclight in Japan

Defeat Flamefront in Japan

Rescue all prisoners

Complete the game and obtain the normal ending

Complete any standard zone without allowing your weapons to overheat

Quickly cycle through weapons after overheating the 30MM Chain Guns to reset the cooldown early

Maintain your crosshairs on the same target while strafing repeatedly to attack while avoiding damage