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