The game tester refers to the gamer that facilitates trying games of various companies, and these companies offer this opportunity to ensure their games are of high quality and are best rated. Titled 'Factions,' the online aspect of the 'The Last of Us' asks players to join the Firefly or Hunter factions and then battle with comrades in two modes: Supply Run and Survivor. However, the Playstation 3 is substantially more in price so this is also something to consider.