Complex sentence: By far the most popular control system for space trading and combat games is the joystick among enthusiasts, and most fans prefer to use this input method whenever possible, although expense and practicality mean that many are forced to use the keyboard and mouse combination.
Split into simpler sentences: By far the most popular control system among enthusiasts for space trading and combat games is the joystick, and most fans prefer to use this input method whenever possible. However, expense and practicality mean that many are forced to use the keyboard and mouse combination.