Posted by Faz

Beach nexus (2011)
Safari nexus (2011)
Nexus (unknown theme) (2012)
Black Friday nexus (2012)
Wild West nexus (2013)
Candy nexus (2014)
Japanese nexus (2014)
RPG nexus (2015)
Space nexus (2015
Fairy tale nexus (2016)
Olympic nexus (2016)
Retro nexus (2017)

Might have missed a few from 2011-2012, but I believe those had no themes. Not 100% sure