Here is my Dreamcast game collection, carefully kept in a CD binder - which is why very few have the game case. The Dreamcast was Sega's last console and it ultimately failed. But what great games came out on this platform!
Please check the pics for what's included with each game - if you don't see it, it's not included! Also, not sure that it matters, but for several of the games in cases, the cases aren't the original ones (which were cracked/broken).