Board Thread:Metal Gear Solid V/@comment-26976559-20151005192501/@comment-6747658-20151006100728

Sahelanthropus' design does indeed seem to be more similar to that of a Gundam, and considering just how big Gundam is in Japan, it would not surprise me, and there are some pretty outragious and heavily armored mobile suits in Gundam.

As for inside jokes...I don't think it would refer to Assassin's Creed, it seems too...I dunno, distant from it. However, it could be referring to Zone of the Enders, considering the giants mechs there, as well as one of Snake's arms being The Hand of Jehuty which refers the main character's mech also named Jehuty.