 The low prices meant that they did not come close to making back the price of the PDP-11, but they were excited by the game's reception and had not intended the prototype to be profitable.As the initial "Galaxy Game" prototype was displayed to the public a few months after the first "Computer Space" prototype, it is believed to be the second video game to charge money to play.As a result of the reception to "Galaxy Game", Pitts and Tuck started work on an expanded prototype.