Disgaea 3: Absence of Justice

To get this trophy, you need to kill “Horizon Pirates” in the item world - these are pirates who travel on a huge wooden boat with a skull and armed with sticks with a finger. Like all pirates, they appear in the world of objects after level 20 and appear during the first 3 turns; if they have not arrived in three turns, you can safely move to the next level and wait for them there. Horizon Pirates usually appears at levels 71 to 79.