The Sentinel on Atari ST

The idea behind this ingenious three dimensional game was to absorb trees around the landscape, turn them into boulders, transport your self as a robot figure to a high enough vantage point in the landscape to be able to see the base that the Sentinel was standing on. Absord his energy and the game was won. If however, he saw you, your energy would be absorbed back into the landscape. Sounds complicated I know but a lot of fun. This is for me simply the best video game ever created.