Originally I used the EA Sega Genesis Sport cases, but I ended up using all of my (then) cheap Sports boxes for my Atomiswave carts. So when I when I went online to find some more cheap sports titles, I was actually a little surprised that these $1-2 sports titles nobody wanted a few years ago are now selling at $10-15 minimum. My only real CHEAP option was to buy the Universal Combo Game Case at about $1.50 each. So the choice was simple, I went to Southtown Homebrew and printed out the covers of the games I own and picked up some cases. The Universal Combo Game Case requires taking some wire cutters or a sharp box cutters to modify the inside of the case to make your Sega ST-V Cart fit. While it's not a perfect option, I like to think of it as a "close enough, why not?" option.