Here is the full list of all 18 磨难之间 / SUFFERING achievements.
First time to Kill a Sinner
First time to Kill 3 Sinner
First time to Kill 7 Sinners
First time to defeat Lardy
First time to defeat Wu Zang
First time to defeat Venn
NEW_ACHIEVEMENT_DESC_2_6
First time to defeat Orr Greed
First time to defeat Boulos
First time to defeat Wright
Obtain the first three Suffering-Soul
Obtain Ghost-Chaos
Trigger Killing Time Mode 20 times
Defeat 2 sinners without interruption
Defeat 5 sinners without interruption