Disney Infinity

This achievement is easy as pie. When you start the game and finish the tutorial, the game will take you to Toy Box mode. Place your world piece onto the top of your Infinity base in the hexagonal slot at this time and it will ask you if you want to go to a world. Choose your favorite world and a character from that world. As soon as you enter, you'll be given a basic mission. Complete it to unlock this achievement.

An easy way to unlock this is to place your Sully piece on the base and go to Monsters University. Squishy will ask you to bash four Fear Tech objects. Do so and you'll unlock the achievement.