I just noticed (and subsequently bought) Irem Arcade Hits at 70% off. I have read some user reviews saying there were some instances of crashing, and others mentioning a poorly designed interface - but I couldn't tell you first hand. I just figured at $2.99 you can't go wrong if you have been holding out. Edit: $2.99 until November 12th. And entirely worth it! The sound emulation does this wierd... skipping thing, but it is really subtle and most of the time I don't notice it. Many undiscovered gems in this compilation. And for $2.99, so worth it.