Splatoon OST - Seaskape (January 2015 Ver.)
used the e3 2014 art for this since the vocals in this song sound veeery similar to the ones in 2014 era splattack leading me to believe this is from about the same time, but the earliest i was able to find it was a trailer from january 2015. everything here seems to be different except for the synths; im guessing the other instruments here were either synthesized as well or just an earlier recording, but i cant perfectly tell with the quality unfortunately (this originally had someone talking over it which is why it sounds a little scuffed)