Games like Agent Sirius
Games like Agent Sirius include Persona 4 Golden, Persona 5 Royal, Tales of Berseria™, Volcano Princess, and Danganronpa V3: Killing Harmony. We matched them by the tags players give Agent Sirius on Steam (Anime, JRPG, Detective, Mystery, and Choices Matter): closest matches first, and among equally close ones the better-known games.
Persona 4 Golden
Shared: JRPG · Anime · Mystery
Persona 5 Royal
Shared: JRPG · Anime · Multiple Endings
Tales of Berseria™
Shared: Anime · JRPG · Female Protagonist
Volcano Princess
Shared: Choices Matter · Anime · Female Protagonist
Danganronpa V3: Killing Harmony
Shared: Detective · Anime · Female Protagonist
Paper Lily - Chapter 1
Shared: Anime · Adventure · Choices Matter
Tales of ARISE
Shared: Anime · JRPG · RPG
AI: The Somnium Files
Shared: Anime · Mystery · Detective
Danganronpa 2: Goodbye Despair
Shared: Anime · Detective · Mystery
Persona 3 Reload
Shared: Anime · JRPG · RPG
Danganronpa: Trigger Happy Havoc
Shared: Anime · Detective · Mystery
Ten Trials of Babel: The Doppelganger Maze
Shared: Female Protagonist · Multiple Endings · Mystery
Metaphor: ReFantazio
Shared: JRPG · Anime · RPG
Back to the Dawn
Shared: Detective · Choices Matter · RPG
Magical Girl Witch Trials
Shared: Detective · Female Protagonist · Mystery
Magical Princess
Shared: Anime · Choices Matter · Multiple Endings
Oxenfree
Shared: Choices Matter · Female Protagonist · Mystery
Mirror 2: Project X
Shared: Anime · Female Protagonist · Multiple Endings
Tales of the Black Forest
Shared: Anime · Female Protagonist · RPG
Phoenix Wright: Ace Attorney Trilogy
Shared: Detective · Anime · Mystery
The Legend of Heroes: Trails in the Sky
Shared: JRPG · Anime · Female Protagonist
FINAL FANTASY® XIII-2
Shared: JRPG · Female Protagonist · Anime
The Wolf Among Us
Shared: Detective · Choices Matter · Adventure
Shin Megami Tensei V: Vengeance
Shared: JRPG · Anime · RPG