Board Thread:News and Announcements/@comment-26391060-20140918144505/@comment-6697950-20140918153135

Crossover = colloboration between two series where the characters of both series come together.

This is a non-canon spin off, as it has "alternative" in the name, but, as it's based in the SAO universe, I don't see why we can't cover it, marking it with the non-canon labels