Final Fantasy I & II: Dawn of Souls is a re-release of the tworemakes of the originalFamicom (NES) games with additional extras. This release also reduces the difficulty level of both games and has a few other gameplay modifications (for example, stats can no longer decrease in Final Fantasy II).
Final Fantasy I features four "Soul of Chaos" dungeons, unlocked during the course of the plot. These elemental dungeons are for high-level players, and contain a collection of bosses taken from later Final Fantasy games. Final Fantasy II includes an extra storyline known as the "Soul of Rebirth." This mode is unlocked after completing the game and acts as an epilogue, featuring characters killed off in the main story. Both games gain a bestiary that tracks all the monsters the player has fought and their stats and weaknesses.
In the original version of Final Fantasy on the NES, the tomb in Elfein read "Here lies Erdrick" - a reference to a prominent character in the Dragon Warrior series. In the Playstation re-release in Final Fantasy Origins, the tomb read "May Link Rest In Peace" - a reference to the protagonist in Nintendo's Legend of Zelda series.
Strangely enough, this text was not altered when the game was released for the Gameboy Advance - a Nintendo-made system!