After a "rocky start," the sci-fi MMORPG Defiance is marking its one-year anniversary by going free-to-play, developer and publisher Trion Worlds announced today. Coming alongside the premier of the second season of the related SyFy show, the change will go into effect on June 4th on the PC and July 15th on the PS3. No word yet on a specific date for the Xbox 360 version.