2K and Green Man Gaming have teamed up to offer a fantastic sale for PC gamers with the 2K Essentials Collection. For just $29.99, you get XCOM, Bioshock Infinite, Borderlands 2 and Civ V, but the madness does not end there. In addition, gamers are entitled to a 50% off voucher for NBA 2K4, Civ DLC, XCOM DLC or Bioshock 2. If that were not enough, our friends at GMG are also giving four free games – Bioshock, the original Borderlands. Civ IV and XCOM Complete. Now that is quite the sales event.