Azure Striker Gunvolt launched in Japan last night, and it came with a little bonus. Those who pick up the game through mid-November can download Mighty Gunvolt at no extra cost.
It turns out that this offer is now being extended to North America as well. The English Azure Striker Gunvolt Twitter account confirmed a few minutes ago:
: happy to announce anyone who buys Gunvolt (in 1st 3 mnths) will also get the 8-bit NES-style retro-demake 3DS romp #MightyGunvolt, free! :
— Gunvolt Official EN (@GunvoltGame) August 20, 2014