This Destiny 2 Siren's Watch and The Rig Lost Sectors page will explain where to find all the mini-dungeons on planet Titan.
If you want more information on how to find Lost Sectors and the rewards they offer, our Lost Sectors locations page can help.
Destiny 2 Siren's Watch and The Rig Lost Sectors
The three Lost Sectors on Titan are:
Methane Flush location
Location: From the Siren's Watch spawn point (the big platform), turn left so you're facing the rest of this sub-area from above.
Jump down and head towards a small building with a solar array on top. Go down the stairs on the roof, drop down one level and the symbol will be on a wall.
You'll then find the entrance by going round the corner.
Strategy: From the point where you just found the symbol, turn right and follow the platform around the side of the building. Enter the circular doorway and go down the stairs, turn left, turn right, turn left, drop down then turn right.
Now turn left again, go forwards and make one final left to enter the main dungeon area.
This fight is against the Hive, and it's a tough fight. There are no Thrals, so need to worry about being rushed, but there are two Shriekers on either side of this area that will bombard you, lots of Knights, Acolytes and the boss, a mean Wizard called Karugul.
He chucks a similar attack to the Shriekers and a single flame shot, so be very careful of approaching him up close.
Take out the Shriekers first, then thin out the Acolytes and Knights. There's a platform to your left (with some green boxes on it) that proves great cover at this point as most of these enemies won't rush you.
Inflict enough damage and the boss will retreat through a door to your right. Instead of following, go up the stairs to the right of that opening.
Thin out the Acolytes and the Knight here, then use a long distance weapon such as sniper rifle or auto-rifle to take out the large number of Acolytes (there are also two Knights at the back that will need dealing with quickly).
Use an energy-based weapon such as fusion rifle to immolate Karugul's shield and take him down.
Cargo Bay 3 location
Location: The Rig. From The Rig spawn point, turn left and run past the open red container.
Now run into the open hanger in front of you and stay on the same level. Head towards the very edge of the hanger (by the ocean) and drop down onto a ledge on the left-hand side.
Be careful, as this area is full of Fallen and this drop can be a little tricky. The symbol will be on the wall just where you dropped down.
Strategy: Go through the small doorway beside the symbol, then turn right and follow the stairs down.
Turn left, crouch to enter a small passage, turn right, then turn left. Go through the small, blue-lit doorway, then turn left. Head down a flight of stairs, turn left and you'll be in the main dungeon chamber.
This large hanger is full of containers (providing lots of cover) and a whole bunch of angry Hive. There are a lot of Acolytes here, so it's very easy to get swarmed, and a handful of Knights at the back.
Take out the Knights first, then thin out a few of the Acolytes. Your boss, Golmuut, is pretty tough and will both retreat and rush you (especially in the last third of his health).
Thankfully, he doesn't have a shield so focus fire on his massive head and use grenades/your super to finish him off. Strafing is key here and a full-on assault, even at Level 20, is suicide. Use that cover well and Golmuut is yours for the killing.
This year's Festival of the Lost has arrived - which includes the Book of the Forgotten and Jurassic Green to unlock. Elsewhere in Season of the Lost, there are new Exotics such as the Ager's Scepter and the long-awaited arrival of crossplay. New activities include the Wayfinders Voyage, the Astral Alignment activity and finding Atlas Skew, Trivial Mystery, Enigmatic Mystery, Ascendant Mystery, Data Cache, Parallax Trajectory and Ascendant Anchor locations. Elsewhere, we've seen new Nightfall weapons such as the Uzume RR4, Plug One.1 and Hung Jury SR4. Other recent new features include transmog and materials Synthstrand, Synthcord and Synthweave, the Splicer Gauntlet and Decrypted Data used to upgrade it.
DS Quarters-2 location
Location: The Rig. To find the symbol, turn slightly right from The Rig spawn point and head for the door shown in the first screenshot.
Turn left, and head through this flooded room, turn right at the end, jump up and you'll find the symbol on the wall to your right.
Strategy: From the symbol, head towards the red door, then down the stairs and through the small doorway shown in the screenshot.
Turn left, then right, follow the stairs down, then turn left. Engage the Acolytes here, turn right twice and beware of the Thrals that will rush you. Turn left, then right to enter a dark corridor.
A flood of Thrals will rush you. Turn right at the red-lit opening to enter the main area.
This main part of the dungeon is almost completely dark, but you'll know you're in the right place because the loot chest will be glittering at the back.
The boss, Thaan'Hul, is a medium-tough Knight, but the sheer number of Thral and Cursed Thral can be deadly.
Play smart, rush the boss, hit him with a super and that should be enough to take him down. Grab the loot and get out of there.