How many players are needed to start a raid? GM Drataso - September 26, 2019 23:38 Updated Follow 1 player is required before a raid can start. 10 players are required for Royal Army Raid to start. Related articles What is the maximum number of players that can be in a raid? I'm Stuck on the quest " Watch Out for Fomors" What is the Nexon Launcher? How Do I Reset My Secondary Password?