Mr. Friendly's model is the size of a small horse. It was to be a crawling creature walking on hoofed legs on its back and spurs on its front, moving in a very awkward, shuffling manner and making a noise resembling "fingernails on a chalkboard". It would act as a scavenger that ate the corpses of dead enemies. This behavior would serve as a logical explanation for the disappearance of bodies that was done to improve the performance of the game.
One of its proposed attacks was to pound the ground and knock the player's weapon out of his hand. It was even suggested that Gordon's glasses fly off and leave the player stuck in combat with blurry vision, a feature that would have been challenging to implement considering the game technology available at the time.

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