Here is the full list of all 63 Dead or School achievements.
Your Launcher skill is over 20
Your life is over 1500
The amount of money spent on shopping is over 30,000 yen
Weapon has been modified 100 times
The attack power of your weapon is over 10,000
3 types of drones summoned
The attack speed of your weapon is over 1,000
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One-shot killed 5 enemies at a time
Your stamina is over 1500
Completed Yoshitaka's mission in Asakusa
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Repel the corrupted Yakuza at Shinjuku Kabukicho
Weapons have been reinforced 100 times
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Your sword skill is over 20.
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Weight limit is over 200
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Your money is over ￥10000
Weapon has been enforced to the maximum.
Your Machine gun skill is over 20
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Attacks evaded 100 times
50 near death situations survived
The number of enemies killed by launcher is over 100.
Defeated a boss at Ichigaya station
Collected all exhibitions
Rescued refugees in Ichigaya
Completed Daiba’s request in Ichigaya
Defeated a boss at Harajuku station
Completed Yurika’s request in Harajuku
Kill an enemy by pushing it into a hole
The number of enemies killed by machine gun is over 100
Defeated a boss at Shinjuku station
Kill an enemy with an aura
Kill a rare enemy
Completed Noriaki’s request in Shinjuku
Rescued refugees in Shinjuku
Purchase an item at the shop for the first time
The number of enemies killed by swords is over 100
Completed Yurika’s request in Shinjuku
Found a rare shop
Obtain a souvenir for the first time
Rescued refugees for the first time
Modified a weapon for the first time
Reinforced a weapon for the first time