I think the expansion pack is mostly about the n64, since you can get most, if not all, genesis games with the genesis collection, which I own. however, some n64 games are among the best games ever made. though, I didn't want to spend as much as I did to get the expansion pack. what I do like is the fact that they offer original controllers for the switch for the system. I don't think I used the nes or snes for those systems on the switch, and I haven't even played the genesis collection, but I've been playing the n64 with just the n64 controller. I'm loving it, now that I know how to hold the controller. it's very comfortable. that's the main selling point, at least for me, is to replicate the original experience. I did buy 2 of nes, snes, n64, and genesis controllers with one being for the switch, the other for the pc. if I had any real life friends who visited me, I'd use both on the system. that was the original intention.