A Star is BornG 5

For this achievement simply create an east Bronze level trail and upload it to the EA servers. You will want to add an exploding device to the center of your arena to speed up the clearing of the board. Once another player has played the trial they have the option to rate your trial. As long as they give you four stars or higher you should be able to unlock this achievement quickly as players will need to vote and clear 100 Bronze trials for another achievement.