Here is the full list of all 47 Persona 5 Strikers achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Started a New Game+ on Merciless Difficulty.
Defeated the Reaper.
Defeated 10 Treasure Demons.
Trained all Phantom Thieves to level 70.
Defeated all Dire Shadows.
Completed the Tree of Knowledge.
Completed the Jail of the Abyss.
Sophia found strength of heart.
Completed the Osaka Jail.
Defeated a Dire Shadow.
Completed 50 requests.
Obtained all Master Arts for Mona.
Obtained all Master Arts for all characters.
Obtained all Master Arts for Wolf.
Opened 50 treasure chests.
Cooked 12 types of food.
Cleared all special requests from the Phantom Thieves.
Completed the Kyoto Jail.
Obtained all Master Arts for Fox.
Spent Persona Points to strengthen a Persona's stats.
Wolf awakened his Persona.
Completed the Okinawa Jail.
Obtained all Master Arts for Noir.
Obtained all Master Arts for Panther.
Completed the Sapporo Jail.
Hit the enemy's weakness 300 times.
Obtained all Master Arts for Queen.
Obtained all Master Arts for Sophie.
Maxed out a BOND skill level.
Obtained all Master Arts for Skull.
Obtained a total 200 items from the Jails.
Used Incense.
Obtained a souvenir for the camper.
Completed the Sendai Jail.
Performed an All-Out Attack 150 times.
Completed a request.
Performed 50 ambushes.
Bought something during a limited time sale.
Cooked food for the first time.
Completed the Shibuya Jail.
Obtained all Master Arts for Joker.
Defeated 200 enemies with a phantom dash.
Witnessed the Phantom Thieves' reunion.
Activated Showtime.
Earned all Achievements.
Completed the Inmate Registry.
Maxed out all BOND skill levels.