REQUIRES INTERNET CONNECTION AND FREE STEAM ACCOUNT TO ACTIVATE. Notice: Product offered subject to your acceptance of the Steam Subscriber Agreement ("SSA"). You must activate this product via the Internet by registering for a Steam account and accepting the SSA. Please see https://store.steampowered.com/subscriber_agreement/ to view the SSA prior to purchase. If you do not agree with the provisions of the SSA, you should return this game unopened to your retailer in accordance with their return policy.