Phantasy Star Generation: 2 is the seventeenth entry in the Sega Ages 2500 series for the PlayStation 2. This remake of the original Phantasy Star II features an updated battle system, graphics, and sound. A thousand years after the events of the first game, Rolf is assigned to investigate the recent increase in biomonsters. Accompanying him is the numan girl Nei, the result of experiments with human and biomonster genes, whom he regards as a sister.