From Sega Retro
Dezaemon 2 (デザエモン２) is a Sega Saturn game released as part of the Dezaemon series exclusively in Japan. Like all games in the Dezaemon series, it allows the user to create home-made shoot-'em-up games, offering a wide variety of options in order to do so.
Additions in Dazaemon 2 include the ability to create dedicated horizontal shooters as well as those which rely on 3D polygon graphics.
There is an extensive library of video games made using the Dazaemon 2 engine, currently totalling over 200.