A game controller includes a trigger-activation sensor, a sensor-activation feature, and a trigger-retention feature. The sensor-activation feature is moveable relative to the trigger-activation sensor. The trigger-activation sensor outputs a control signal based on a relative position of the sensor-activation feature and the trigger-activation sensor. The trigger-retention feature is configured to removably affix a selected removable trigger accessory to the game controller. The selected removable trigger accessory is one of a plurality of differently configured removable trigger accessories removably affixable to the game controller. The selected removable trigger accessory is configured to change the relative position of the sensor-activation feature and the trigger-activation sensor based on finger manipulation of the selected removable trigger accessory when the selected removable trigger accessory is removably affixed to the game controller.