An example of a role-playing game that was heavily playtested is the 5th edition of Dungeons & Dragons. For this game, Wizards of the Coast (WotC) used an open playtest with volunteers from their online community to evaluate the game as it was being developed. New playtest packets were distributed to the testers as WotC revised the game. WotC focused heavily on the results of this testing owing to the mixed reactions that the 4th edition rules received, showcasing another advantage of playtesting: helping to ensure that the final product will be a commercial success. The process produced feedback to WotC regarding which aspects of the game needed modifications or redesigns.