Sunman is an unreleased action video game developed by EIM and planned to be published by Sunsoft for the Nintendo Entertainment System in 1992.

There are also some side scrolling flying levels where the player can shoot laser/heat vision from Sunman's eyes.

The early, rough prototype of the ROM was also made for release on The Lost Levels, and it indeed had sprites of Superman as the original sprites for the main character, and the background music played in-game replaced with John Williams's Superman Theme.

In February 2014, a ROM hack was released by a user with the pseudonym Pacnsacdave of a full Sunman to Superman NES conversion.

The hack changes the title screen, cutscenes, and sprites to those of the actual Superman prototype ROM.