Super Nintendo Entertainment System (SNES)
originally released as Final Fantasy II in 1991
taken from Wikipedia

Because the previous two installments of the Final Fantasy series had not been localized and released in North America at the time, Final Fantasy IV was distributed as Final Fantasy II to maintain naming continuity. Later remakes of the game have been released in North America under the original title. While the game retains the storyline, graphics, and sound of the original, developers significantly reduced the difficulty for beginning gamers. Certain items were less expensive or rare, and several battle commands were removed—including Tellah's Recall (allowing him to use a random magic spell), Edward's Medicine (which used Potions from the player's inventory to heal the entire party), and Cecil's DarkWave (an attack which targeted all enemies but sacrificed a portion of his health). Several enemies and bosses were reduced in strength and assigned special weaknesses. Entrances to secret passages on field maps were outlined in blue, whereas they were invisible in the original Japanese version. The translation was changed in accordance with Nintendo of America's censorship policies (at the time before the formation of the ESRB and its rating system), and certain errors were introduced during localization.

Certain character descriptions and elements of backstory have been cut due to space limitations. For instance, Kain's background and relationship with his father and the motivations for Zemus's plans to colonize Earth are not in the game. The logo for the U.S. version features the same font and sword-letter-T emblem used in the Game Boy Final Fantasy Legend series rather than an image of Kain, which was used for the Final Fantasy IV title logo (and was used for its later releases as well). Other changes include the removal of overt Judeo-Christian religious references and certain potentially objectionable graphics. The magic spell Holy has been renamed White. All references to prayer are eliminated; the Tower of Prayers in Mysidia is renamed the Tower of Wishes, though the White Mage in the tower still calls it "Tower of Prayers" and Rosa's Pray command is absent. Direct references to death are omitted, although several characters clearly die over the course of the game. Anything considered too risqué has been censored, such as bikinis on town dancers (replaced by leotards). The Programmers' Room special feature (in which the player can find a Porno Magazine) has been removed. New promotional character art was made for published previews.

In addition to the content edits, one major gameplay function was altered: The multiplayer option, which operated similarly to the same option in Final Fantasy VI, was completely removed, as was the ability to edit controller settings.