Slain creatures may drop expedition tickets. Tickets can be used to start an expedition.

Expeditions may be started at Britain, east of the bank.

Expeditions may be started by using your own Reward Points or Expedition tickets.

Once the owner of the portal enters the expedition, his party members will be invited to tag along. Party members will be required to be at least 50 tiles from the portal in order to join the expedition party. 

Expeditions are instanced, you and your friends will be the only one inside for 30 minutes. Your group will be kicked to a safe area once the time has elapsed.

Expeditions have their own bosses and exclusive loot.