[msbarnett]

A "couple of minutes" for a confident, competent solderer, which excludes about 99% of the target market for this thing. (Here's how to do it, if anyone's curious: http://www.retronintendoreviews.com/nes-cartridge-battery-re...)

And while overall most NES games didn't use a battery, many of the most popular ones (many of the ones included in this thing, in fact) do need a working battery. Final Fantasy, both zeldas, startropics, tecmo bowl, crystallis, kirby's adventure...

[ashark]

If Crystalis has a battery-backed save system it's news to me. And I've beaten the game on the original hardware.

[msbarnett]

Crystalis absolutely has a save/continue system. You can see some guy demonstrating the save system in crystalis in this video, complete with save functionality: https://m.youtube.com/watch?v=73za3LHWzwk

Are you thinking of some other game?

[ashark]

Incredible. I owned the game for years, played it a lot, beat it once, and never noticed a way to save, so I assumed you couldn't. I even had the manual!