Bubble Bobble

Bubble Bobble is the first game in the Bubble Bobble series of games, produced by Taito in 1986, at the start for arcade and later converted to computers and consoles. 
In the game, the player control a dragon that spits bubbles to eliminate the enemies.
The game is centered on the adventure of two dragons, Bub and Bob. The objective is to save the girlfriends of the protagonists, for that the player must face a hundred different stages. They use bubbles for attack the enemies. Each time an enemy is eliminated, a reward is generated that increases the player's score.