Home versions contain two gameplay modes: the "Arcade Mode" which preserves the look and feel of the original arcade version, and the "Extra Mode" that has enhanced graphics, additional enemies, modified bosses, and tougher difficulty, as well as a different ending. Also in Extra Mode, when the player gets a "continue", the score accumulated from the first stage will be retained (i.e. score will not reset to zero). Completing either mode unlocks a "stage select" option to play individual stages in the completed mode (except for the final stage) for a high score, while succeeding in both modes unlocks a "13 Players" option.