This paper provides a systematic review of current research findings using exergaming as a treatment for improving cognition and dual-task function in older adults. A literature search was conducted to collect exergaming intervention studies that were either randomized controlled or uncontrolled studies. Of the seven identified studies (five randomized controlled studies and two uncontrolled studies), three studies focused on cognitive function alone, two studies focused on dual-task function alone, and two studies measured both cognitive function and dual-task function. Current evidence supports that exergaming improves cognitive function and dual-task function, which potentially leads to fall prevention. However, it is unclear whether exergaming, which involves both cognitive input and physical exercise, has additional benefits compared with traditional physical exercise alone. Further studies should include traditional exercise as a control group to identify these potential, additional benefits.