Games like Horizon Odyssey
Games like Horizon Odyssey include Persona 3 Reload, Clair Obscur: Expedition 33, Persona 5 Royal, Persona 4 Golden, and Metaphor: ReFantazio. We matched them by the tags players give Horizon Odyssey on Steam (JRPG, RPG, Party-Based RPG, Story Rich, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Persona 3 Reload
Shared: JRPG · RPG · Party-Based RPG

Clair Obscur: Expedition 33
Shared: Story Rich · RPG · JRPG

Persona 5 Royal
Shared: JRPG · Story Rich · RPG

Persona 4 Golden
Shared: JRPG · Story Rich · RPG

Metaphor: ReFantazio
Shared: RPG · JRPG · Story Rich

FINAL FANTASY XII THE ZODIAC AGE
Shared: JRPG · RPG · Story Rich

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Story Rich · Atmospheric

FINAL FANTASY
Shared: JRPG · RPG · Party-Based RPG

Fallout 4
Shared: RPG · Exploration · Atmospheric

FINAL FANTASY IV
Shared: JRPG · RPG · Party-Based RPG

FINAL FANTASY VII REBIRTH
Shared: RPG · JRPG · Party-Based RPG

Cyberpunk 2077
Shared: RPG · Story Rich · Singleplayer

FINAL FANTASY IX
Shared: JRPG · Story Rich · RPG

FINAL FANTASY VII REMAKE INTERGRADE
Shared: RPG · JRPG · Party-Based RPG

Persona 3 Portable
Shared: RPG · JRPG · Story Rich

OCTOPATH TRAVELER II
Shared: RPG · JRPG · Party-Based RPG

Fallout: New Vegas
Shared: RPG · Story Rich · Exploration

STAR WARS™ Knights of the Old Republic™
Shared: RPG · Story Rich · Party-Based RPG

Shin Megami Tensei V: Vengeance
Shared: JRPG · RPG · Story Rich

FINAL FANTASY II
Shared: JRPG · RPG · Party-Based RPG

SKALD: Against the Black Priory
Shared: Atmospheric · Exploration · Strategy

Wartales
Shared: RPG · Party-Based RPG · Turn-Based Strategy

FINAL FANTASY XV WINDOWS EDITION
Shared: RPG · JRPG · Story Rich

OMORI
Shared: Story Rich · RPG · 2D