A 1-credit clear of the arcade game Extreme Downhill. The game crashes during the end sequence in the current version of the emulator (WolfMAME 0.253). Still counts!
I logged a bug with mametesters to let them know that after the snowflakes appear in the end credits, the game displays nothin' at all! ...nothin' at all! ...nothin' at all!! (Stupid sexy Flanders)