Use the following methods to generate hit points for Heroes of Worlds Unknown characters.
Hit points are not rolled. Instead, at each level (including 1st) characters gain a fixed amount based upon the size of their hit die.
In addition to the above amount, at 1st level all characters gain a one-time bonus to their hit points equal to half their Strength score (rounded down).
See Also: Death and Dying for additional rules relevant to the loss of hit points.