I only owned a normal DS, but I think the 3DS is backwards compatible, so here goes. (Leaving off Square Enix stuff and Pokemon stuff, which is all great, but you probably know about those anyway.) * Ghost Trick is a puzzle solving game with a deep story line where you try to figure out the circumstances of your own death. * GoldenSun is number 3 in a series of great RPGs. * The World Ends with You goes completely its own way with the RPG genre. * Dragon Quest Heroes: Rocket Slime has you do things. I can't describe this one. But it was a huge time sink that I don't regret a minute of. Quirky and fun!