Shooter-adventure where you control Fester through a city invaded by aliens. A UFO has attacked, and you're tasked with clearing streets and sewers of enemies like slime duplicators, skeeters, and oversized scorpions before confronting alien bosses. Combat uses a top-down perspective as you collect weapon upgrades and navigate maze-like environments. Family members appear throughout to offer assistance—calling Lurch brings backup firepower when you're overwhelmed. The game mixes overhead exploration with combat sequences, demanding you manage health carefully while hunting down the source of the invasion. Expect pattern-based boss fights and gradual power progression as you work toward a final confrontation. It's unforgiving in difficulty, suited for players comfortable with trial-and-error gameplay from the NES era.
