Sifu

The Tower is the fourth level of Sifu.

To unlock the achievement you have to find the 15 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 - The Sanctuary - When you reach the control room you will have to fight some enemies. After this, you reach a small room with a big screen on the left, and four enemies. The collectible is at the bottom of the screen. This is a flyer for the Sanctuary.

Collectible #2 - Employees - At the start of the mission, when the receptionist welcomes you

Collectible #3 - Jingfeng's Computer - When you first play the level, go to the left elevator. You will step out inside Jingfeng's office and she will have a quick words for you. Then kill her 3 guards and go back to her desk. You find the computer here.
You also unlock a new choice for the conversation with the Tech Guy (mission 2) to get the Hacker's Key

Collectible #4- Elevator - This is the elevator on the right at the start of the level. Call the elevator to unlock this collectible

Collectible #5- Shadows - Automatically unlocked when dark assassin's attak you during the elevator fight

Collectible #6- The Guardian's Vow - Obtained inside Jingfeng's safe (#12)

Collectible #7- The Rift - As you go deeper into the Tower, your surroundings will transform thanks to Jingfeng's bell toll, adding this entry to your board

Collectible #8- A Conspiracy - Automatically unlocked when reaching the room where Hui Su is waiting for you (#9)

Collectible #9- Hui Su - As you descend through the Rift, you will come across a lone female warrior looking at a large wall of scrawled papers. Defeat her to add this entry to your board

Collectible #10- Sun Mei - Similar to #9, Sun Mei will be waiting for you in a room with various weapons. After you take her down, you will get this entry added to your board

Collectible #11- Elevator Keycard - Obtained upon defeating Sun Mei (#10)

Collectible #12- Jingfeng's Safe - Once you get the Hacker's Key (from mission 2: The Club), go back to Jingfeng's office (left elevator) and interact with the computer. You will see the safe opening on the right. Inside is the Artist's Key (#14) as well as the Guardian's Vow (#6)

Collectible #13- Art Auction - At the beginning of the mission where the receptionist is: go to the left inside the room with the sofas. The collectible is lying on a table

Collectible #14- Artist's Key - Inside Jingfeng's Safe (#12)

Collectible #15- The Dawn - After progressing through the conference rooms, you will come across a small square room with enemies debriefing. After defeating them, the Dawn logo will appear on a TV screen and will be added to your board. Also automatically unlocked inside the room where Sun Mei waits