For long-time fans of NBA 2K14, the tunedata.iff file is the engine under the hood. While roster files (.ROS) change who is on the court, the tunedata.iff file dictates how those players behave, specifically by overriding the game's default gameplay sliders (Casual, Simulation, and Default) for both the User and CPU.
tunedata.iff (located in the game’s main folder).tunedata.iff.AI Enhancements: Updates can improve CPU logic for fast breaks, rebounding (like "D Boards Attribute"), and defensive positioning. nba 2k14 original tunedataiff updated