The Episode 22: The Phantom Zone / Science Spire Add-on for DC Universe Online has 2 achievements.
During the Science Spire challenge, energize the Central Power Conduit with no more than 4 energy spheres
During the Phantom Zone Operation, on the first attempt at the fight, throw all of the Sunstone Crystals into the chasm before the timer expires on any of them, then defeat the Malfunctioning Jor-El A.I.