Here is the full list of all 40 Oedo Trigger!! achievements.
Unlock All Achievement
Knockdown enemies count over 100
Knockdown enemies count over 500
Knockdown enemies count over 777
Knockdown enemies count over 2000
Knockdown enemies 100 times with the H shot.
Knockdown enemies 300 times with the H shot.
Knockdown enemies 1000 times with the H shot.
Stage Clear Count Over 10
Stage Clear Count Over 20
Stage Clear Count Over 30
Clear Chapter1
Clear Chapter2
Clear Chapter3
Clear Chapter4
Clear Chapter5
The number of weapons exceeds 1
The number of weapons exceeds 5
The number of weapons exceeds 17
Increase life to 1
Increase life to 3
Increase life to 5
Maximum combo count exceeds 20
Maximum combo count exceeds 40
Maximum combo count exceeds 60
Clear the stage without knocking down enemies
The cumulative total of money acquired exceeds 10000
The cumulative total of money acquired exceeds 100000
The cumulative total of money acquired exceeds 500000
The number of times of entering Sage mode exceeds 10
The number of times of entering Sage mode exceeds 30
The number of times of entering Sage mode exceeds 50
The cumulative number of defeated in the Kenja mode exceeds 100
The cumulative number of defeated in the Kenja mode exceeds 300
The cumulative number of defeated in the Kenja mode exceeds 500
The number knocking down in one Kenja mode exceeds 10
The number knocking down in one Kenja mode exceeds 30
The number of times that you were caught by a girl exceeds 10
The number of times that you were caught by a girl exceeds 30
Find Oyuki, who was supposed to be gone.