Best Keiba: Derby Stallion

Best Keiba: Derby Stallion is a simulation game which focuses not only on horse races, but on producing and training racehorses as well. Thus it has something from managerial game. The stage is a ranch, stables, and racetrack. Initially, it starts with one breeding mare and 15 million yen in funding. The first given breeding mare is of course the lowest class.

Horse maintenance costs are 100,000 yen for each horse on a farm and 400,000 yen for each horse in a stable. This fee is collected at the beginning of each month. When the funds reach zero, the game ends with bankruptcy.

Of the basic parameters of a racehorse, four are directly related to racing: speed, stamina, temperament, and competitive spirit. Furthermore, performance changes depending on factors such as sturdiness, fatigue recovery, condition, horse weight, and growth rate. If you have a bad temper, you'll be late, or you'll waste your stamina by moving ahead without following the instructions on the way. If you have a fighting spirit, it will be easier to win when competing in a straight line. If it is highly durable, it is less likely to break down during training or racing. There will also be fewer cases of athletes becoming unwell after a race. If you have a high level of recovery, it will be easier to overcome fatigue after a race, and you will be able to run tougher even if you run repeatedly at short intervals. The condition of a horse is what is called a biorhythm, and no matter how capable a horse may be, if it is put into a race when it is not in good shape, it will not be able to fully demonstrate its potential. Each type has a different peak time, with early maturing being around the middle of 4 years of age, normal being late 5 years of age, and late maturing around 7 years of age. Horses might by injured during races and in such cases they are excluded from next races. In extreme situations, when prognosis are poor, horse can be euthanized.