Thanks to the wonders of MAME I played one of my favourite obscure arcade games, Off the Wall. It's a 1991 Atari title that's highly pleasing with impressionist graphics, clever gameplay, and fantastic music produced on the YM2151 FM synthesis chip. I made a small sample of the music; listen to the Ogg.
MAME is an important contribution to video game history. Gameplay was so great back in the day! You can do a lot with 336x240 graphics and a 7.16MHz 68000.
I took me 86 quarters and a couple of hours to get to wave 101. The game doesn't really change much after wave 60. If only I had two analog dial controllers, it's a really fun two player game.