the games a bit wrong when they say they where not Jedi or sith yet they where callled Je'daii Order and they where brote to the planet Tython by the Tho Yor Pyramid Ships that collect force sensitive species from all around the galaxy including sith pure bloods. it is true there was no sith order or empire yet but the Infant empire was the dark power of this time
i would read the comics Dawn of The Jedi, Issue 0 is just a comic of a lot of info on the Je'daii Order but if not here a link to some info http://starwars.wikia.com/wiki/Je%27daii_Order
but i think the Je'daii code is the best my self
There is no ignorance; there is knowledge.
There is no fear; there is power.
I am the heart of the Force.
I am the revealing fire of light.
I am the mystery of darkness
In balance with chaos and harmony,
Immortal in the Force.