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