Seiken Densetsu: The Emergence of Excalibur

In 1987, Square had the ambitious goal of a major RPG for the Famicom Disk System, a floppy-disk expansion to the Nintendo Family Computer (Famicom, released in America as the NES). The game planned was called Seiken Densetsu: The Emergence of Excalibur. The game was said to be a turn-based RPG and would come on five floppy disks.

By late 1987 things were looking grim for Square, and the company was making plans to close up shop. The Seiken Densetsu project, which didn't get very far beyond planning stages (despite Square having taken preorders for the game), was cancelled. Instead, Square focused on getting what was to be its last game out the door – Final Fantasy.

Of course, Final Fantasy ended up being a huge success and kept Square in business. A few years later, the Seiken Densetsu project was revived in the form of a Game Boy title, which was released as Final Fantasy Adventure, and evolved into the Mana series.