In the hopes of proving a strong point, developer Valve has made their popular puzzle game Portal free-to-play until the 20th of September for both PC and Mac users.
Despite having never played video games themselves, American legislatures continue to harangue modern games for having no artistic or educational value. Unfortunately for them, Portal seems to have escaped their periphery. With over 5-million copies sold, the first-person puzzler is among the most popular games available today. The premise is fairly simple: Without killing or harming anyone, the player must traverse various trap rooms using their portal gun, a 'weapon' that shoots alternating portals that allow players to bend the rules of physics.
Scientific studies have conclusively shown the benefits of playing the game, which helps children navigate virtual space and understand basic spacial rules... all while giving them a laugh!