Amongst races, there are four varying breeding relationships listed in Table A.
| Relationship | Example |
|---|---|
| Identical | human vs. human |
| Similar | human vs. elf, human vs. halfling |
| Related | human/horse vs. centaur, human/elf vs. half-elf |
| Different | human vs. eagle, human vs. horse |
Whether or not two individuals can produce offspring depends on the relationship and conditions given in Table B.
| Relationship: Identical | |
| Additional Requir.: None Chance of Fertility: As normal Result: As per race |
|
| Relationship: Similar | |
| Additional Requir.: None Chance of Fertility: As the lesser fertile of the two races Result: Half breed |
|
| Relationship: Related | |
| Additional Requir.: None Chance of Fertility: As the lesser fertile of the two races Result: Produce pure breed of the race the size of the female (see below) |
|
| Relationship: Different | |
| Additional Requir.: Magical or divine intervention Chance of Fertility: 0% (without intervention) or 100% (with) Result: Produce a new race that may be fertile and breed true |
|
Size (of the creature you filthy minded churl) may play a part in some crossbreeds. For example, in human/horse/centaur pairings. The result depends, in part, on the physical size of the parents. Consult Table C.
| Relationship | Race of Father | Race of Mother | Race of child |
|---|---|---|---|
| Similar | Human (Elf) | Elf (Human) | Half-elf |
| Related | Human (Half-elf) | Half-elf (Human) | Human or Half-elf |
| Related | Elf (Half-elf) | Half-elf (Elf) | Elf or Half-elf |
| Different | Human | Horse | Centaur (with interv.) |
| Different | Horse | Human | None (or a dead woman) |
| Related | Human (Centaur) | Centaur (Human) | Human |
| Related | Horse (Centaur) | Centaur (Horse) | Horse |
There is one interesting exception, humans and halflings. While they are fertile with each other, such a pairing will only produce one or the other race. This may be because they are so similar that there can be no half breed race. Consult Table Cb.
| Relationship | Race of Father | Race of Mother | Race of child |
|---|---|---|---|
| Similar | Human | Halfling | Halfling |
| Similar | Halfling | Human | Halfling or Human |
For some specific races, the relationships are given on Table D.
| Race | Relationship | Examples |
|---|---|---|
| Centaur | Similar | None |
| Related | Horse, Human. | |
| Different | Most other races | |
| Elf | Identical | Elf (all varieties) |
| Similar | Human | |
| Related | Drider | |
| Different | Most other races | |
| Half-elf | Similar | None |
| Related | Elf, Human | |
| Different | Most other races | |
| Human | Similar | Elf, Halfling, Ogre, Orc (and variations) |
| Related | Centaur, Half-elf, Half-orc, Minotaur, Satyr | |
| Different | Most other races |
On the specific case of an elf and a centaur use the following suggested rules:
These rules are not complete but hopefully gives the GM a good base to develop specific rules for inter-species breeding.
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Ch05-Inter-Species.php -- Revised: January 27, 2021.