The Sanctuary is the fifth and last level of Sifu.To unlock the achievement you have to find the 14 collectibles. Some of them are automatically unlocked as you progress through the level. I will list them anyway.
Below is the board collectibles with numbers:
Collectible #1 -
Aromatic Garden Door - Just outside the Massage Room, to the left of the Dragon Shrine and the two columned plots of planted herbs
Collectible #2 -
Keycard - At the end of the level, you will have to fight different enemies, starting with 2 basic ones and a fat guy. Continue up the stairs until you reach the final opponent with the staff. This will automatically unlock the keycard to the board
Collectible #3 -
Alchemist Vows - Past the opponent you defeat to get the Keycard #2: enter the door and to the left of the dragon shrine, you will find this entry
Collectible #4-
Sacred Mountains - After unlocking the
true ending by sparing Yang (see dedicated achievement), you have to finish the short sequence post-fight, and the you will reach this sacred place. At the top of the mountain the entry will unlock
Collectible #5-
Statue - Same place as #2, where you fight the first wave (2 guys + 1 big guys). Looking at the stairs, the statue is at the left side, close to a meditating non-hostile NPC
Collectible #6-
Aromatic Garden Key - After defeating the two enemies within the massage room, this entry will be added to the board
Collectible #7-
Flower Key - Located on the counter under the TV, in Room 206. You get access to the room thanks to the keycard obtained in Mission 1: The Squats
Collectible #8-
Yang's Flowers - Obtained after defeating Yang
Collectible #9-
The Five Values - Obtained after entering Yang's office for the final fight
Collectible #10-
Fajar's Medical Report - On the counter under the TV, in Room 206. Same as #7
Collectible #11-
Room 206 - Head to the Treatments section of the initial building, then proceed into the Guesthouse across the courtyard. From there, head up to the second floor and at the left end of the corridor will be Room 206. Use Keycard 206 from the Squats to open the door and collect #7 and #10 inside
Collectible #12-
Inner Garden Door - Once you enter the Sanctuary, continue straight and open the doors. Straight again are closed doors (you need a keycard for this (#2)). Interact with this door to unlock this entry
Collectible #13-
The Tombs - Obtained after defeating Yang and encountering the tombstones in the following cutscene
Collectible #14-
Newspaper - When you enter the Sanctuary, in the room with the receptionist: turn left into the waiting area and pick up the newspaper off the glass table. For some reasons, this is not highlighted with
but this still counts for the board and the achievement