In golf, a perfect round is a round of eighteen holes where all holes were played on average at one under par (average of birdie on every hole) resulting in a score of 55 on a par 73 course, 54 on a par 72 course, 53 on a par 71 course, and 52 on a par 70 course. The term 'perfect round' is used for a 54 as the lowest score generally accepted as being in the realm of possibility among professional golfers on a par 72 course. This has remained the standard and has never been achieved by a professional golfer in a professional event.

has there ever been a perfect game of golf?
no