A small-sized text input device is attachable to and removable from a game controller. The text input device can be sized and configured to fit between grip portions of the game controller, and can be attachable to the game controller with a separate attachment bracket. Different brackets can be used to attach the text input device to different types of game controllers. A game player holding the game controller can access the text keys of the text input device with his or her thumbs, and by making only minor (or no) adjustment to the position of his or her hands on the grip portions.