Debido a que la mayor parte del código del juego fue reciclado de ''El Portal Negro'', se decidió no llamarlo ''Ultima VIII''; Richard Garriot había afirmado en entrevistar alrededor de 1988 que ninguna de las dos ''Ultimas'' compartían el mismo [[código fuente]], a diferencia la competencia de ese entonces, la serie ''[[The Bard's Tale]]'', y probablemente se sintió obligado por esta afirmación.
The original plot of the game was significantly different from the released game, mostly attributed to the fact that Electronic Arts put schedule pressures on Origin and some parts had to be cut to meet the deadline. Most of the major changes occur on the latter half of the game. Some major plot holes were also introduced due to the pushed-ahead release schedule. In cutting material to meet EA's deadline, many bugs were introduced, and many features of the game were incomplete or unused. Many 'dead ends' were also created in the complete, working portion of the game. Due to ''Serpent Isle'''s more linear approach, these 'dead ends' often forced the player to go back to a long-ago saved point or simply start over. To the disappointment of many fans, Serpent Isle marks the beginning of larger influence of Electronic Arts on the series.
===Expansión ''La Semilla de Plata''===