"Fantasy Earth" began in 2001 as a project under Enix, with Puraguru founder George Kamitani steering the project away from its initial concept of humans fighting vampires to its current kingdom-based aesthetic. Kamitani and Puraguru left the project in 2004 due to differences with Square Enix, with Multiterm taking over production duties. Production met with several challenges including logistic issues, the technology required for large-scape online battles, and the merger of Enix with Square in 2003. The original music was composed by Basiscape, a company founded by composer Hitoshi Sakimoto.