Dr Chaos is an action-adventure game for the Nintendo Entertainment System centered on Michael’s search for his missing brother, Dr. Chaos. The game blends haunted-house exploration with creature encounters, hidden rooms, special weapons, and life force management.

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• Explore a maze of corridors filled with monsters, booby traps, and rooms that can hide either danger or useful equipment.
• Michael can find special weapons and vials of secret strength needed to survive the experiment’s strange effects.
• The adventure uses three different screen patterns, shifting the action between exploration and hazard-filled sequences.
• A graphic score pad tracks life force, weapons found, and weapons currently in use.
• Built-in memory capacity allows progress to restart from a saved score point.

The story’s science-experiment-gone-wrong setup gives the NES release a horror-tinged adventure structure built around rescuing Dr. Chaos from the haunted house.