Various game controller hardware and user interface configurations are disclosed. Some configurations may comprise two circular trackpads, driven by the player's thumbs, which may be clickable, allowing the entire surface to act as a button. Haptic feedback may be based on dual linear resonant actuators (e.g., by means of strong, weighted electro-magnets attached to each of the dual trackpads), capable of delivering a wide range of force and vibration, allowing control over frequency, amplitude, and direction of movement. The haptics-related components in certain implementations may also play audio waveforms and thereby function as speakers. In the center of the controller according to certain configurations may be another touch-enabled surface, this one backed by a display screen. In some configurations this entire screen itself may also be clickable, like a large single button. A variety of other exemplary implementations and configurations are described.