Dissent - p. 1 Dragon Age II Guide
Last update: 11 May 2016
The quest giver: automatically after second conversation with Arishok [Docks]
Step 1: Talk to Anders
This quest should appear in your journal after your final conversation with Arishok at the Docks, while completing the main quest Blackpowder Courtesy. Go to the [Darktown - Ander's Clinic] location and click on Anders #1 (M23, 2) to talk to him. Grey Warden will tell you that a templar Ser Alrik wants to perform a Rite of Tranquility soon. You can ask him some additional questions and at the end of a conversation you have to decide #2 whether you want to help Anders to solve a situation with Ser Alrik (+5 friendship points with him) or not (+15 rivalry points with him; end of the quest).
Step 2: Cross the Gallows Dungeon
If you've agreed to help Anders, be sure that he is an active member of your party and go with him to the southern part of Darktown. Find here a passage (M23, 14) leading to the [Gallows Dungeon] location #1 (M66, 1). Before entering a new area you can decide whether you want to go there right now #2 or you need some time for preparations.
Head south. You'll run into first opponents after using the stairs and reaching the fork #1 (M66, 2). I do not recommend fighting them here, because they would surround you very easily. It is much better to stay near the stairs or even retreat to the previous location and wait for them to come. I suggest attacking lyrium smuggler foreman first #2.
After killing foreman attack the rest of opponents - lyrium smugglers and dwarven mercenaries #1. When the battle is finished, examine enemies' bodies, because you can find an item which activates a side quest #2.
Unlocked side quest: The One True Pantaloons
After winning the battle you have to choose one of two passages leading deeper. If you choose an eastern passage #1 be very careful when you reach a southern room - you can be attacked by poisonous spiders and giant spiders during disarming a complex trap #2. First of all kill these monsters which can spit poisonous venom at you.
If you choose a western passage #1, you won't fight anyone of disarm any traps. Whichever path you choose, you'll have to reach the stairs leading south #2 (M66, 3).
Go ahead and be ready to deal with a new group of opponents when you get to larger location. Begin with attacking lyrium smuggler foreman #1 and after his death start eliminating standard smugglers and mercenaries. After winning the battle use the stairs #2 and head south-east.
Only one more group of enemies separates you from the main part of dungeon. Be careful, because you'll have to face two lyrium smuggler foremen #1. Head south. Save you game before entering the last room #2 and that's because you'll meet Ser Alrik (M66, 4) and his templars there.