Contra is too difficult without the cheat (maybe with) and with the cheat you get no achievements.
Frogger is OK but after 10 minutes you've had about all you can take.
I'm really glad I didn't purchase this one, its a good evening on gamefly though. Playing through Symphony of the Night is the best part of this disc. So if you're not interested in tossing several hours into that classic this disc is mostly a waste.
I did rack up the easy achievements on all 3 though ;)
This wasn't a bad rental. I got it mainly for Castlevania and was pleasantly surprised with the number of arcade trial games. There was UNO, street fighter, and pac man to name a few. Worth a rent for something different