Glitch ranks are accessed through data corruption or the "gaining permanent control of a Chryssalid/Tentaculat" and lastly...Alien Packs. They include(tftd):
- "Units in Target Entrance" used primarily by alien soldiers
- "Units in Target Exit" used primarily by terror units
It is unknown if it gives any benefits or is just a glitch, the Chryssalid crashes when you check its rank so it is assumed it doesn't have one.
Apparently these ranks do nothing except a few alien benefits, and it is impossible to advance if you have one of these ranks.
To further research this, a Soldier must get this rank through hacking or data corruption.
I think the rank actually activates higher reaction fire.