There are 9 demon doors in Albion with each one offering treasure if you can fulfill its request.
-Along the Bowerstone Road in ROOKRIDGE, you come past a small bandit camp with a large boulder in the centre of it. As you follow the path you'll see a demon door on your right. This requires getting your dog to perform tricks. - rewards you a Potion of Life
-In Oakfield, if you look at your map where the path forms a loop, at the top of this path near to the waters edge is a demon door. The door requires a marriage proposal be performed in front of it. If you are already engaged/ married you must blow a kiss to your beloved in front of the door. This gets you Hammerthyst (legendary mace).
-Bowerstone lake, the very SW path leads to a door that wants you to perform expressions - Bloodlust roar, fart, middle finger, worship, blow kiss, growl, point & laugh, dance, laugh, thrust you'll get a Lucky Charm Augment.
-In Bowerstone Cemetery, when entering the cemetery from Bowerstone, on the right side he requires meat to open - kick a chicken at the door. You'll get the following potions - Balverine strength potion, Practiced skill potion, and Infused Will potion.
-Brightwood, just north of the Westcliff entrance, but south of the lake with three small islands in it (south west on the map). Requires cheese. Mutton chops (Bowerstone Stylist), dreadlocks (Bloodstone Stylist) and then he will want you to wear a Strumpet Skirt (Tart Skirt) - Bloodstone, Farmer's Hat (Yokel Hat) - Oakfield, Posh Shirt (Noble Gent's Shirt) - Bowerstone Market. If you are already wearing any of those items he will ask for different ones. You'll get a Merchant's cap, Knotted Shirt, and Harlequin Trousers for your efforts.
-WraithMarsh - North of the drowned farm on the right path requires an audience. Grab 10 followers
-Westcliff- southwest corner of map. Right of the path when heading away form howling halls. Be halfway corrupt or more and will get you a Calavera (legendary mace).
-Bloodstone - On the right as you enter from Wraithmarsh. you need to perform with your lute - you can buy loots from stores or find one in your travels. This rewards you with a Master Longsword 79 damage - no slots
-Fairfax Gardens under the manor, the tunnels lead to an underground tree to access the tunnel go under the steps to the main building requires all other demon doors being unlocked first. Gives you Marcus's Poems and 50,000 gold.
If you have already opened all 9 doors before downloading "See the Future", you will get the achievement when you load the game with the DLC for the first time