I have a soft spot for Prince of Persia, but I have an even softer spot for Karateka, its (rotoscoped) predecessor on an ancient green phosphor Apple //e, a computer (and an age) where everything seemed possible.
My favourite Easter egg about karateka:
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The first two games to fall in love with - Karatéka and then Alley Cat.
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Yeah, Karateka deserves more than a simple aside here. It's amazing that he made that on his own as a college student. I loved that game.