I once did a stream with some friends where I marathoned this game while drinking heavily. It was a good time. 100%ed the game, collected the hadoken, beat Sigma with it, then went back and beat him clean just to prove I was sober enough to do it.

This after doing the same with mega man 1-6. I need to pick that series back up, I tried doing it with x2 but Sigma VS My Liver 2 came out in Sigma's favor