Not sure why this game did not set the standard for arcade home ports of the dreamcast. That console had a shit ton of them and many were simply ports with an "Arcade" and "Original" mode. This game also had a form of mission mode that varied the gameplay and rewarded the player for completion. I played Outtrigger the other day and it also had its own take on Arcade/Mission mode except for the variability between the two was minimal.