Dolphin Blue was produced by Sammy for the Atomiswave in 2003, it's a platafform shooter with gameplay similar to Metal Slug but it also features great high resolution 2D and 3D graphics. The Atomiswave hardware is similar to the Naomi/Katana/Dreamcast, so this port was made possible by reverse engineering the hardware for the arcade.

NOTE: THIS GAME HAS LONG LOAD TIMES. Be prepared to wait a minute or two between each level and for the game to start up initially.
All Dreamcast reproduction games include a full manual, and region free disc. NOT ALL Dreamcast systems can play CD reproductions, your Dreamcast must have been manufactured before October 2000, Dreamcasts manufactured November 2000 or later most likely can not play reproductions, but they are far less common systems. Look for the sticker on the bottom with the date on it, and a number in a circle near the word PAL or NTSC, if the number is 0 or 1 you can play reproductions on your console.

Please check that your console is capable of playing them before purchasing.