Here is the full list of all 30 Bright Memory: Infinite achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Assassinate 14 people without being spotted by the enemy in the “Surrounded” infiltration mission
Destroy 5 enemy vehicles with missiles during the car chase
Defeat 100 enemies using your sniper rifle
Defeat 50 enemies using your sniper rifle
Defeat 100 enemies using your handgun
Defeat 50 enemies using your handgun
Defeat 150 enemies using any skill
Defeat 20 enemies using flame-type weapons or skills
Defeat 150 enemies using your assault rifle
Defeat 80 enemies using any skill
Defeat 150 enemies using your shotgun
Defeat 80 enemies using your shotgun
Unlock “Rocket Punch: Lv.3”
Clear the game
Clear the game on “Revenge” difficulty
Kill the Six-armed Emperor
Kill the Tian Yu Emperor
Acquire 20 “Reliquaries”
Defeat 80 enemies using your assault rifle
Kill the Giant King
Unlock “Blade Slash Whirlwind: Lv.3”
Acquire 100 “Relics”
Defeat the Tian Yu Emperor
Use “Defend” to deflect 20 enemy bullets
Sever 100 enemy limbs using weapons or skills
Sever 50 enemy limbs using weapons or skills
Clear the game on “Hell” difficulty
Activate “Counter” 50 times
Activate “Counter” 100 times
Acquire 50 “Reliquaries”