Football Manager 14 is the next addition to the Football Manager series. In August 2013, the Sports Interactive official website unveiled the main tweaks and upgrades to be added in the new release, the most noticeable being the decision to finally release a simultaneous version for the Linux operating system. Among the other changes announced were extended options in transfer and contract negotiations as well as player conversations, the ability to play with more than just three nations loaded in Classic Mode, a tactical overhaul and improvements to the 3D match engine. Studio Director and long-time Football Manager lead Miles Jacobson also announced that for a week in mid-August he would announce one new feature every day via his Twitter feed, the first feature being the ability to arrange testimonial matches.