I’ve been working on a retro challenge since about April this year of trying to beat Primal Rage (Arcade pcb) at max difficulty without taking damage.
I’m nearly there, but for now my best is 13 out of 14 perfect rounds and a few hits during the Final Battle re-fights.
On its face, the challenge sounds crazy - but the thing to remember is the game doesn’t have some complex AI that learns about you as you play. No. It has a bank of patterns it uses, and straight up just reads your inputs to determine a response. If you know how the AI will respond, you know how to counter. Play for about twelve minutes without dropping a combo, mistiming a jump, or miss a special even once /ever/, and you have yourself a perfect game. Easy, right :p
I’m stalled right now until I can upgrade / replace my supergun over the next month-ish, but I hope to complete the challenge by the end of the year.