Here is the full list of all 38 New Slippery Samurai achievements.
Cleared stage 2.
Cleared stage 2 with S rank.
Cleared stage 3.
Cleared stage 3 with S rank.
Cleared stage 4.
Cleared stage 4 with S rank.
Cleared stage 5.
Cleared stage 5 with S rank.
Cleared stage 6.
Cleared stage 6 with S rank.
Cleared stage 7.
Cleared stage 7 with S rank.
Cleared stage 8.
Cleared stage 8 with S rank.
Cleared stage 9.
Cleared stage 9 with S rank.
Cleared stage 10.
Cleared stage 10 with S rank.
You have cleared stage 11.
Cleared stage 11 with S rank.
You have cleared stage 12.
Cleared stage 12 with S rank.
You have cleared stage 13.
Cleared stage 13 with S rank.
You have cleared stage 14.
Cleared stage 14 with S rank.
Cleared stage 15.
Cleared stage 15 with S rank.
EX Stage 1 cleared.
EX Stage 1 cleared with S rank.
You have cleared EX Stage 2.
EX Stage 2 cleared with S rank.
EX Stage 3 was cleared.
EX Stage 3 was cleared with S rank.
EX Stage 4 was cleared.
EX Stage 4 cleared with S rank.
You have completed stage 1.
Cleared stage 1 with S rank.