From the game box:
The legend continues. A new evil threatens the land, and once more, a band of young heroes stands against it.
Final Fantasy II was the second FF installment by Square. The game features a distinguishly darker "rebel army" scenario, and is infamous for its unique 'levelling' system – characters increased their HP by being wounded in battle, and players quickly realized that hitting yourself was the best way of getting wounded. Players ended up entering battle only to constantly hit themselves, attacking the real enemies only when they had lost enough HP to get a gain.
Not to be confused with Final Fantasy II, the US release of the SNES RPG Final Fantasy IV
This game and the sequel Final Fantasy III was originally not released in the US. The first SNES counterpart Final Fantasy IV however, was, and in an attempt to avoid confusion, it was renumbered to Final Fantasy II upon US release. As FFV also never got a US release, but FFVI did, getting the US title Final Fantasy III. Upon the release of Final Fantasy VII though, even the US title got the same numbering, and after that, all remakes of the earlier games have retained their original numbering.
Hironobu Sakaguchi: Director
Nobuo Uematsu: Music
Yoshitaka Amano: Character & monster design