Here is the full list of all 57 HAAK achievements.
The base game contains 53 achievements, and there are 2 DLC packs containing 4 achievements.
Find 50 Mysterious Disks.
Achieve 100% exploration.
Editor-in-chief Ben Dover thought you're really good.
Brings hope to Good-Hearted Fort.
Obtain 4000+ Tongbao in total.
Destroy all 4 signal towers.
Become a puppet of GAEL.
Find 30 Mysterious Disks.
Thoroughly search North Station
Fuse 5 HP slots
Kill 18 Laser Drones
Fuse 1 EP slot.
Solved the maze in Momoyama.
Change the color of your cape once.
Found 10 Mystic Disks
Complete [Pass the Tunnel]
Dropped into the acid pool 10 times
Complete [Road to the South]
Complete [North Station]
Dropped into the pit of Sanhe Ruins
Use a Bathroom Portal once.
Electrocuted 10 times
Smashed 10 Big Chests
Complete [Escape from Ruins]
Enter World Map
Defeat Wang Ping in Sanhe Ruins
Defeat Wang Ping in Sanhe Ruins within 3 minutes
Fuse a HP slot
Destroy 100 bricks
Found a Mystic Disk
Found a hidden item
Obtain a Power Glove
Squeezed to death
Stay in North Station for more than 2 hours
Spend less than 8 minutes to escape from Metro Tunnel
Bitten to death by dogs 3 times
Pass through the heavily guarded pathway in the [Brewery] without shutting any of the 4 doors blocking the sight.
Defeated 3Kyo without getting damaged.
No death until beating Fatty.
Someone can actually beat the game in 5 hours, wow!