Player-owned port/Special voyages

One to six special voyages are available each day, dependent upon which one or two adventurers are in port that day. One adventurer is unlocked during the tutorial, other adventurers are unlocked by a special voyage that is only available after the player has reached level 90 in the corresponding skill. Once unlocked, adventurers may be randomly selected to appear in the port after a reset occurs or an adventurer reroll is used; although the Adventurer(s) are randomly selected, the number and selection can be influenced by building the appropriate bar or icon port upgrades.

Special joint voyages are available when specific pairs of adventurers are in the port. When an adventurer offers more than one special voyage, only one may be taken. When the player starts a special voyage using an adventurer, all other special voyages for that adventurer are removed from the list. Choosing a joint voyage removes all other special voyages for both adventurers.

Each adventurer can provide story mode voyages, resource voyages, scroll voyages, and experience voyages. Story mode voyages advance the adventurer's storyline, but do not provide other rewards until the entire storyline has been completed. Story mode voyages for each adventurer progress in sequence through the areas of the Wushanko Isles. Adventurers will not offer story voyages for areas the player has not unlocked.

All other special voyages appear to be tied to the highest area unlocked by the player; the adversity is not affected by the player's port management focus. These voyages provide an immediate reward, but do not advance the storyline. The reward for scroll voyages is selected by the player using the port management settings. The reward for a successful scroll voyage is always a piece of the chosen scroll, but the scroll must be chosen before the voyage is started. The chance of receiving scroll or experience voyages can be increased by building the appropriate upgrade in a totem hotspot.

Special voyages can't be rerolled, but the Adventurer reroll reward from the port's random event minigames allow the player to reroll the visiting adventurers, which will result in a new set of special voyages being generated. If an Adventurer reroll is used after all special voyages are done, it will add one or more new special voyages for a new visiting Adventurer.

The Assassin
The Assassin is unlocked by reaching level 90 in Slayer. Special joint voyages are possible when the Assassin and the Convict are both in port at the same time. Upgrade an icon hotspot with the Human Skull to increase your chance to attract the Assassin; the cost is 1000 Chimes.

The Biologist
The Biologist is unlocked by reaching level 90 in Herblore. Special joint voyages are possible when the Biologist and the Whaler are both in port at the same time. Upgrade an icon hotspot with the Mammoth Head to increase your chance to attract the Biologist; the cost is 1000 Chimes.

The Convict
The Convict is unlocked by reaching level 90 in Thieving. Special joint voyages are possible when the Assassin and Convict are both in port at the same time. Upgrade an icon hotspot with the Stocks to increase your chance to attract the Convict; the cost is 1000 Chimes.

The Missionary
The Missionary is unlocked by reaching level 90 in Prayer. Special joint voyages are possible when the Missionary and the Occultist are both in port at the same time. Upgrade an icon hotspot with the Saradominist Symbol to increase your chance to attract the Missionary; the cost is 1000 Chimes.

The Occultist
The Occultist is unlocked by reaching level 90 in Runecrafting. Special joint voyages are possible when the Missionary and the Occultist are both in port at the same time. Upgrade an icon hotspot with the Occult Artefact to increase your chance to attract the Occultist; the cost is 1000 Chimes.

The Whaler
The Whaler is unlocked by reaching level 90 in Fishing. Special joint voyages are possible when the Biologist and the Whaler are both in port at the same time. Upgrade an icon hotspot with the Whale Skull Trophy to increase your chance to attract the Whaler Adventurer; the Cost is 1000 Chimes.

Joint voyages
Joint voyages are only available when certain pairs of adventurers are in port at the same time: the Assassin and the Convict, the Biologist and the Whaler, or the Missionary and the Occultist. Accepting a special joint voyage will remove all remaining voyages for both adventurers.

Trivia

 * The missions requiring 9001 in one of the stats are references to the internet meme "Over 9000".