I've used to play Nintendo's Vs. Golf back-in-the-day-when-you-could-actually-play-it-in-the-arcades.
When I got into MacMAME (now 20 years ago!!!!) I picked it up again, and the best score I shot at the time was 59:
I think that was 13 under par (the course changes, so the overall par changes as well).
Recently, since I got MAME running again properly for the first time in years, I've been playing it again. I've gotten to where I can birdie every hole on the course... just not always in the same game.
Although I just got real close:
Just two more... (and yes, I did miss two putts).
Admittedly, one hole was actually an eagle, and three were pars, but one of these days, I'm going to shoot 18-under. :)