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Trouble Shooter, called Battle Mania (バトルマニア) in Japan, is a shoot-'em-up developed and published by VIC Tokai for the Sega Mega Drive in 1991 in the US and in Japan in 1992. An Asia-only sequel, Battle Mania Daiginjou, was also developed.
The player plays as both Mania Ohtorii (Madison in the US version) and Maria Haneda (Crystal in the US version), a sister team called the "Trouble Shooters," who are called to rescue the King's son, who has been kidnapped by the crime group Blackball.
Mania and Maria hover around in mid-air using the D-pad to move, but will move together in the configuration they are in. Pressing shoots; holding the button will trigger rapidfire but the shots cannot be aimed. changes the direction Maria is shooting in (either to the left or to the right; Mania will always shoot to the right). fires the special weapon chosen in the Engine selection screen before starting the level; before you can use it, it must be charged by holding for a certain amount of time. Maria is invulnerable, but if Mania dies once, the game is over and the player must use a continue.