Not an official Record Store Day 2015 release, but released on RSD 2015 by Coretex in Europe, and RevHQ in the US.
Includes a 7 flexi with the song Afflicted Past and acts as a decoder for the insert.

From Coretex:
Packaged as a double LP and flexi 7/decoder set, The World Is Ours documents all 40 hard-to-find cadences for the first time. Use the decoder flexi 7 to unlock the secrets within the layout. Because knowing is always half the battle.

Clear - 700
Purple - 150 (THIS)