Here you have some of the existing DB videogames. All of them are in Japanese, except for some which are translated into French. To use these games you need to install an emulator of the system for which the game you want to use is designed. It is possible that the emulator requires any special file. Here you have the most popular emulators and the files which can be necessary to run them... If you want more information you can visit Zophar's Domain.
And now it's time for the games... It is necessary to point that by law these games can only be used during only one (1) day. They are samples of games and as such it is not legal to keep copies of them.