Gorillas was a little known game by Microsoft that was imbedded in DOS (I believe it was found in 5.0 and higher). The game featured two giant gorillas that could move up and down skyscrapers. The gorillas threw exploding bananas at each other. When one gorilla had sustained the requisite amount of damage the game ended with the other gorilla winning. Not high entertainment, but when you were bored and stuck in the office it helped to pass the time. I believe that there were a few other little games embedded along with Gorillas, just about as entertaining. Gorillas is an almost forgotten foot note in the annals of computer gaming.
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