The Chosen Commander/Quick guide

Food poisoning

 * Talk to Captain Undak, east of the bank in Dorgesh-Kaan. (Chat options 2-1-2)
 * Climb the nearby stairs and talk to Mernik in the nursery.
 * Talk to Torzek outside. (Chat 4-1-1)
 * Talk to a child about what they ate.
 * Talk to Captain Undak. (Chat 3)
 * Go down the stairs and south to the market.
 * Talk to the goblin selling Frogspawn gumbo. (Chat 1)
 * Talk to the goblin selling soup. (Chat 1)
 * Talk to Merchant Walton, southeast of the market. (Chat 1-1-4-1)
 * Kill the merchant.

Zanik

 * Talk to Zanik.
 * Jump on the goblin southwest of the bowl statue.
 * Keep jumping and take the crossbow.
 * Grapple the next statue and take the pendant.
 * Look in the bowl.
 * Enter the western portal.

The council

 * Go to the north end of Dorgesh-Kaan and up the stairs.
 * Watch the cutscene and agree to help find Zanik.
 * Run south of the city, up and over staircases until you reach the agility course.
 * Descend the ladder top.
 * Talk to Zanik directly south. Sit next to her, say nothing for as long as possible.
 * After the cutscene talk to Zanik. (Chat 4)
 * Talk to Captain Undak for a set of H.A.M. robes. (Chat 1-1)
 * Prepare for battle, but only wear the H.A.M. robes.

Beef with H.A.M.

 * Enter to the H.A.M. headquarters in Lumbridge.
 * Talk to Johanhus Ulsbrecht in the southern room. (Chat 3-3-3-1)
 * Talk to Milton in the windmill near the fishing guild. (Chat 2-1)
 * Climb down the ladder.
 * Run to the hideout's eastern wall (near the prison).
 * Talk to the guard next to the prison, note the current day. (Chat 1-1-3-3)
 * Read the noticeboard south. Remember the name of today's guard.
 * Enter the main area and pickpocket the correct guard.
 * Return to the prison guard. (Chat 1)
 * Take the prison key and rescue the prisoner.
 * Escape with Grubfoot:
 * Tell Grubfoot to wait here.
 * Run into the kitchen, squeeze through the hole.
 * Open 1 of the 2 doors.
 * Go back through and open the other door too.
 * Tell Grubfoot "I'll distract the guard".
 * Stand 1 square north of the guard and talk to him.
 * Follow Grubfoot into the room.
 * Tell Grubfoot to wait at the west door.
 * Squeeze into the kitchen and take a dirty plate.
 * Talk to Grubfoot in the bedroom, "follow me".
 * Exit the east door and run to the big doors north.
 * Kill Sigmund.
 * Kill Zanik repeatedly, keep selecting positive answers each time.

Lumbridge caves

 * Run west for an earthquake.
 * Clear the fallen rocks.
 * Talk to Zanik. (Chat 4-1)
 * Direct her grapple so that she hits the rock.
 * Go through the cave and talk to Juna.
 * Run northwest to exit the cave.
 * Go over the stepping stones and run directly north.
 * Talk to Kazgar. (Chat 1)

Time capsule

 * Enter Dorgesh-Kaan and talk to Captain Undak north of the market. (Chat 4-4)
 * Climb the northern stairs for a cutscene.
 * Climb up the stairs and talk to the scribe. (Chat 1-2-1)
 * The obelisk is north of the market. Run east of the obelisk and talk to Tegdak. (Chat 2)
 * Talk to the scribe.
 * Go back through the city gates and talk to Mistag. (Chat 1)
 * Talk to Oldak north of the city bank. (Chat 1-3-1-1)
 * Return to the agility course. Then run east to the power station.
 * Talk to Turgall. (Chat 2)
 * Take these supplies to Oldak southeast of the market. (Chat 1)
 * Talk to Zanik. (Chat 1-1-3)
 * Talk to Mernik in the children's nursery. (Chat 1-1)
 * Call the Ambassador a coward in the house north. (Chat 2-1)
 * Go back to Mernik. (Chat 1-1)

Final fight

 * Prepare to fight enemies weak to magic.
 * Talk to Zanik.
 * Defeat the bandos avatar. Then chat option 4.
 * Pick up all 4 parts of the crossbow while killing statues.
 * Use the crossbow pieces on each other.
 * Kill the avatar again. Then chat option 4.
 * Take the avatar's pendant.
 * Sit next to Zanik and say nothing.
 * Follow Zanik through the portal.
 * (Optional) Click the screen to skip the long cutscene.
 * Quest complete!