Rex Ronan - Experimental Surgeon is a medical-themed action game developed by Sculptured Software and published by Raya Systems. The player controls Rex Ronan, a surgeon who has been shrunk down to microscopic size and injected into the body of a patient with various ailments caused by unhealthy lifestyle choices. The objective of the game is to travel through the patient's body, fighting off viruses and bacteria while performing surgeries and administering medicine to heal the patient's organs. The game features a mix of side-scrolling action and puzzle-solving elements, and was released for the Super Nintendo Entertainment System (SNES) in 1993.

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