karateka_broderbund_software_3pic.twitter.com/m853KUKRlM
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Oh yeah, Karateka is a classic, with gorgeous visuals and animation, by the man who would go on to make the original Prince of Persia.
I feel like I played it on dos as opposed to Atari. I also have a memory of a spike gate closing on the character and thinking that I would get in trouble if my parents caught me playing such a violent game! 
Yeah personally I played it on Commodore 64.
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