Games like Nocturne: Prelude
Games like Nocturne: Prelude include Nocturne, Eastward, OMORI, Clair Obscur: Expedition 33, and Finding Paradise. We matched them by the tags players give Nocturne: Prelude on Steam (JRPG, Rhythm, PvE, RPG, and 2D): closest matches first, and among equally close ones the better-known games.

Nocturne
Shared: Rhythm · RPG · JRPG

Eastward
Shared: RPG · Story Rich · JRPG

OMORI
Shared: RPG · Story Rich · 2D

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

Finding Paradise
Shared: 2D · RPG · Story Rich

Rakuen
Shared: JRPG · Story Rich · Cute

Persona 5 Royal
Shared: JRPG · RPG · Story Rich

Impostor Factory
Shared: Story Rich · 2D · RPG

Chained Echoes
Shared: JRPG · RPG · 2D

Artis Impact
Shared: JRPG · RPG · Story Rich

STAR OCEAN THE SECOND STORY R
Shared: JRPG · RPG · PvE

LISA: The Painful
Shared: RPG · Story Rich · JRPG

Undertale
Shared: Story Rich · RPG · 2D

OneShot
Shared: Story Rich · Cute · 2D

LiEat
Shared: RPG · Story Rich · 2D

Rhythm Doctor
Shared: Rhythm · Story Rich · 2D

Granblue Fantasy: Relink
Shared: JRPG · PvE · Story Rich

Metaphor: ReFantazio
Shared: JRPG · RPG · Story Rich

CHRONO TRIGGER®
Shared: JRPG · RPG · Story Rich

Ni no Kuni™ II: Revenant Kingdom
Shared: JRPG · RPG · Cute

Persona 3 Reload
Shared: JRPG · RPG · Story Rich

Muse Dash
Shared: Rhythm · Cute · 2D

Persona 4 Golden
Shared: JRPG · RPG · Story Rich

FINAL FANTASY VI
Shared: JRPG · RPG · 2D