Detana!! TwinBee

Detana!! TwinBee is a vertically scrolling shooter game following the same conventions established in the original TwinBee , where players assume the role of Light and Pastel (whose names are given in the audio drama TwinBee Paradise ) taking control of TwinBee (P1) and WinBee (P2) across seven levels to defeat invading forces of the evil alien Iva and save planet Meru after receiving an SOS message sent by Princess Melora. The control configuration differs between regions; in the Japanese version, one button is used to fire the gun at airborne enemies while the other is used to drop bombs to the ground, while both buttons are used to do shoot and drop bombs at the same time in the European version. Holding down the shot button will cause a power-meter at the bottom of the screen to fill up, allowing the player to fire a "Big Shot" attack when releasing the button.

Power-up items consist of bells which can be uncovered by shooting the floating clouds, as well as items uncovered by destroying land enemies. As with TwinBee , players can shoot the floating bells to change their colors. Besides the five different colors from the original TwinBee (yellow, white, blue, green, and red), two new bells are introduced: a purple bell that provides a "tail shield", activating barriers around the player's ship and a black bell that decreases speed of the ship. Mini-bells and the lucky star from the first TwinBee return as well.

GwinBee, a ship similar to TwinBee and WinBee also appears, allowing players to combine their ship with GwinBee to fire wider fire beams. Two players can also align their ships side by side to achieve the same effect or align their ships vertically for a powerful five-way spread. If both players align their ships with GwinBee between them, he will spring out and destroy all on-screen enemies. After the first loop is completed, players can replay it for a harder second loop.

The game will be entirely over if the final stage is cleared again, but running out of lives results in a game over unless players insert more credits into the arcade machine to continue and receive a "free" power-up.