Seeking Salvation | Act II Dragon's Dogma Guide
Last update: 11 May 2016
In short: A journey to the Catacombs to meet a lot of the undead.
Difficulty level: Easy.
At the beginning of the quest talk to one of the indicated NPCs in search for information.
Then, go to Mason - he can be found in the Slums/Sewers (you need to go down the ladder to reach them).
Mason will point you to your targets - go to one of them to express your interest in a mysterious cult. You'll learn that the meeting is held in the Catacombs.
The Catacombs are located north of Gran Soren, near the northern castle.
There, follow the only available path straight ahead, killing Zombies.
At one point you'll stumble upon a closed stone door. Open it with the lever lying nearby.
Further in the underground you'll keep finding torches - light them up so as not to fight in darkness.
Take the elevator down - simply use the switch.
Downstairs, run through the narrow corridor and enter the chambers with sarcophagi. Open another door. When you reach a fork in the road, chose either way - both lead to the same place.
Pass through the dark, narrow caves with an Ogre (you don't have to kill it). The next complex of chambers has a gate behind which is the mission goal. The gate cannot be opened, so use the winding stairs. Then climb back up on the shelves.
Turn into the corridor right of the mission marker. After a cutscene and interrupting the ceremony, fight back the Skeletons.
In the next chamber you'll run into Mason and a cult worshipper he had caught. Mason will tell you to kill the man. If you do it, you'll get on his good side (he'll have more quests for you). If not, he'll break off any contact with you.
A little behind the place where you meet Mason, there is a ladder leading to the surface.