I really liked Bmanx2000's case, but I wanted to personalize mine a bit. I figured while I was at it I'd remix it with some other designs I may make for some friends and that others would like too.
Flip them over so they're face down like the original case. If you want to ensure the design prints well you can leave them in their current orientation, but it will take twice the time and material due to all the supports, but then the tabs inside may not print right.
These designs are only 0.4-0.5mm deep to keep the case from being too thin and the cuts are pretty narrow, so if you flip them face down many of them should be printable without support, maybe with the exception of something like the Triforce, Metroid, and Super Smash. Even then it would only be one layer. You can see in my make how it turned out with supports, as it only prints the one layer of support brim and any first layer smooshing makes it impossible to remove. It looks neat in it's own way, but it's not as intended.
The Zelda Sword and Zelda Eye designs have details that will not slice even with a 0.2mm nozzle, but it doesn't detract from their appearance IMHO. The Majoras Mask design needs a 0.2mm nozzle to get what I'd consider acceptable detail, with a 0.4mm nozzle too much doesn't slice.