Alien Egg, a game by PAON DP, is a mobile RPG alien breeding game that was released in Japan. The game has been up and running for almost a year now and they are finally porting the game over for an English version! It was mentioned that Ambition will be localizing the game to be available in English speaking countries.
In the world of Alien Egg, they were suffering from an Alien invasion (talk about irony). Your purpose in the game is to kill those aliens, with your own bred alien. The game is simple with an auto-mode for ease of play. Nothing beats an alien on alien action just to breed new and stronger aliens to fight against other bad aliens. Cool.