Best Keiba: Derby Stallion

The game requires players to manage their horse's maintenance costs, which include fees for horses on farms and in stables. These costs must be paid at the beginning of each month, and if the player runs out of funds, they will go bankrupt.

Players must also consider the basic parameters of a racehorse, including speed, stamina, temperament, and competitive spirit. Each parameter affects performance, and factors such as horse weight and growth rate can also impact results. Players must balance their horses' needs to achieve success, as a bad temper or fighting spirit can hinder progress.

The game's racing system takes into account the horse's biorhythm, which changes over time due to age, training, and other factors. Players must time their races carefully to maximize their horses' potential. Injuries can occur during races, and if a horse is badly hurt, it may be excluded from future competitions.