Chances are that if you're purchasing a game for a particular console, you won't try to jam it into a different console with the expectation that it'll work. Sometimes backwards compatibility comes into play though, and on occassion you can take a game from an older generation and play it in a newer generation machine. It doesn't work the other way around. Nothing good will come of slipping a Wii U disc into a Wii, for instance, nor does playing a PC Engine Super CD game with the wrong system card inserted. The lines used to be a little blurrier though. Consider the Game Boy Color, a handheld system that played both classic Game Boy games, fancy Game Boy Color games, and games designed for both pieces of hardware. It could be confusing to remember which kinds of games worked in which versions of the hardware, so games that only worked on the Color model could be inserted into the original Game Boy despite the fact that those games would not play. What's a developer to do? Include an error screen that tells the player to try the game again on a Game Boy Color. Now there's a full visual catalog of these error screens over at VGMuseum in which you can experience the thrill of incompatibility for yourself for the Game Boy, Neo Geo Pocket, and WonderSwan. Most of the images are plain text, some include the stylish game logo, and a few go above and beyond with comical little scenes.