A rare, vintage game developed by Taito and released December 31, 1988.  The premise is simple: take control of bubble-blowing dinosaur and blow bubbles to trap a monster.  After the monster is trapped, squash the bubble and turn the monster into fruit.  Do this to all of the monsters in the stage, collect all of the fruit, and move on to the next stage.  All of this easy to learn but very hard to master.  You can find a few of these games online: Bubble Bobble 1 on NES being rare and Bubble Bobble 2 on NES being the rarest.  Costing between $100-$1,000 for Bubble Bobble 2 on NES.