Things just got a bit more otherworldly in Lineage II. From October 22 to November 5, Alien Researchers will be invading level 85+ hunting zones and monsters will drop Monster Research books. The L2B2 NPC is also in town. The week after, from November 5 to November 12, the L2B2 is still hanging out, but no more Monster Research drops. Finally, November 12, the L2B2 makes like a tree and leaves, taking with him the Laser Gun and Monster Research.