What is the name of this game?

[callynyan]

Long ago, while browsing bitcointalk I stumbled upon a browser based space themed game.
Yeah, why did I find such a game in this forum? but I did.
I think its name contained the letter "z" or "x"
While creating your account you could choose the type of planet and which type of player you were.
Planet types ranged from A to E and each planet had different animals, resources and power sources.
You could play as a Stealth something and be safe from PVP.
I think half of the population was your work force.

Oh and the source code of the game was non-English.

Does anybody remember/know the name of the game?
Could you link me to a site where I can play it or maybe to its source code?