Wal-Mart Stores Incorporated and several other big-name retailers have agreed to voluntary measures for handling the sales of video games. The measures are designed to keep explicit video game material intended for adult consumption out of the eager hands of those underage. As part of the new accord retailers will display explanatory signage defining the ratings, and have agreed not to sell “adult only” and “mature” games to minors. This will be audited in part by a “mystery shopper” program. Additionally, stores have agreed to refund money when games are inadvertently sold to minors in violation of their policies. The game industry agency, the Entertainment Software Rating Board or ESRB, announced details of the agreement.