Monster Run, developed by Big Global, is a free Android game that lets you play around with an egg and collect DNA to create your monster. The game consists of running on a bridge, collecting gold coins, and DNA to increase the power of your monster egg. Each color of DNA creates a different monster species, and players can choose to collect one or multiple colors of DNA to create their monster.

The game also features obstacles that players must avoid on their way to the arena. Once in the arena, players can break the eggshell to reveal their monster, whose power can be increased with coins. The game culminates in fighting enemy bosses, where the more powerful your monster is, the more money you can win.

Overall, Monster Run is a fun and addictive game that offers an exciting monster-building experience. The game's graphics are impressive, and the controls are easy to use. However, the game may lack depth for some players, and the in-app purchases may be a turn-off for others. Nevertheless, if you're looking for a game that offers a unique and enjoyable monster-building experience, Monster Run is definitely worth checking out.