Claim: The role-playing, single-player video game, Sigma Harmonics, was developed and published by Square Enix for the Nintendo DS platform.
Evidence: Sigma Harmonics (シグマ・ハーモニクス, Shiguma Hāmonikusu) is a role-playing video game developed and produced by Square Enix for the Nintendo DS handheld game console. Single-player Role-playing video game Nintendo DS Square Enix Square Enix
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