Polybius Invaders

Polybius Invaders is a Space Invaders-style arcade shooter with optional psychological augmentations that can be toggled on: infra-sound and subliminal messages, which alter the sensory experience of the game in intended and unintended ways. The threat is General Goo and his wave-based alien army, arriving across twenty-five stages with four named bosses and a final direct confrontation. Weapon pickups are available throughout.