Grasshopper Manufacture
The soundtrack was composed by members of the sound team of Grasshopper Manufacture. Grasshopper Manufacture had previously worked with Nude Maker on the audio design of "Steel Battalion". The most notable composer was Masafumi Takada, whose work at Grasshopper Manufacture included "Killer7" and "No More Heroes". The game was one of Takada's last projects with Grasshopper Manufacture before becoming an independent composer at the end of 2008. The soundtrack was principally composed by Takada and Jun Fukuda, who Kono described as the two composers he trusted the most. Additional music was composed by Etsuko Ichikawa and Yusuke Komori. Kono requested tracks that would express the expansive nature of space, something which proved challenging due to the DS's limited sound capacities. The ending theme "Infinity Route" was performed by Chieko Nishimura.