In no particular order, here are the top 5 releases (my favorites) for the month of December, 2013. Please keep in mind that this does not mean that every other release from December was no good (also, this is solely "my" opinion). I also want to mention that this doesn't mean every album was released in December, it only means that I happened to come across it or became aware of its existence around that time.
"Trapdoors & Secret Passageways"
"The MystiMeaner Collective Mixtape Vol. 1"
"From North to South of Hell Vol. 5
"It's a Trap!"
Black Snow 2