These are achievements related to the various Sidestories DLC.
- Main article: Sidestories: Further Analysis
- Sherlocked - Complete all the investigation missions in the DLC
- Stranger than Fiction - Find the location related to
Love & Loathing
- Main article: Sidestories: Love & Loathing
- Fear and Loathing in Tokyo - Complete the missions in the DLC
- All Along the Defence Towers - Complete the requirements during the The Right Round mission
The Last Pagan
- Main article: Sidestories: The Last Pagan
- Kawaii Crime Capers - Complete all missions in Sidestories: The Last Pagan. Note: The player can receive one Deep Mystery Box, per account, for this achievement.
- Sycoil Smash - Gather a large group of sewer-dwelling Filth creatures and drop a Sycoil tanker on them.
- Nest Ninja - Escape the Filthy nest in Kaidan by sneaking past the Birds of the Zero Point Pathogen without attracting any attention.
- Catch Me If You Can - Complete the mission "The Bank Heist" without being seen.
- The Colour of Tragic - Use the Frowning Mask of Kan'ami to follow a divergent emotional trail and discover its tragic tale.
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