Right now, TRION is running an ARG for the game. Find the codes and enter them for ranks and in-game rewards when the game goes live.
See the page here: https://defiance.com/en/my-ego/
GW2: Yak's Bend - Dolnor Numbwit, Elondra, Festoon Turnbuckle
LOTRO: Gladden - Dolnor Numwit, Elondra Numbwit
TSW: Elondra "Clorisa" Numbwit, Noldor "Dolnor" Numbwit, Festoon "Swivel" Turnbuckle
City of Steam: Whatever needs testing (ie: DolnorGoblin), Numbwit on forums
SWTOR: Dolnor, Elondra, Noldor