The Episode 26: Wayne Manor Gala / Kandor Raid Add-on for DC Universe Online has 2 achievements.
During the Wayne Manor Gala Duo, defeat the final bosses without disabling any of the hydroponic setups and without allowing any of the hydroponic setups to spawn an enemy by destroying them all before even one of their timers expires
During the Kandor Raid, defeat Domsday without any group member setting off Doomsday's Adaptive Resistance