Xenoblade Chronicles X new song (partially heard in second trailer). Be warned, it may BLOW YOUR FREAKING MIND! Updated with link to download song!

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Samus Aran said:

The development cycle for this game is unusually long however, which makes me wonder why. 

Seem obvious to me; it's their first HD-level project, and it's a massive open world game. Logically, it would be a very time consuming undertaking.