Games like Reminiscence
Games like Reminiscence include The Hungry Lamb: Traveling in the Late Ming Dynasty, LoveChoice, Love Is All Around, Undertale, and My Vow to My Liege. We matched them by the tags players give Reminiscence on Steam (Indie, Visual Novel, Historical, Romance, and RPG): closest matches first, and among equally close ones the better-known games.

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Visual Novel · Historical · Multiple Endings

LoveChoice
Shared: Romance · Visual Novel · Choices Matter

Love Is All Around
Shared: Visual Novel · Romance · Singleplayer

Undertale
Shared: Choices Matter · Indie · RPG

My Vow to My Liege
Shared: Visual Novel · Romance · RPG

The Weeping Swan: Ten Days of the City's Fall
Shared: Historical · Visual Novel · Multiple Endings

Road to Empress I
Shared: Choices Matter · Visual Novel · RPG

Volcano Princess
Shared: Choices Matter · RPG · Visual Novel

Florence
Shared: Indie · Romance · Casual

Emily is Away <3
Shared: Indie · Choices Matter · Casual

Far Away
Shared: Visual Novel · Choices Matter · Singleplayer

The Life and Suffering of Sir Brante
Shared: Choices Matter · RPG · Visual Novel

Flowers Blooming at the End of Summer
Shared: Indie · Visual Novel · Romance

Mirror 2: Project X
Shared: Visual Novel · Singleplayer · RPG

Knowledge, or know Lady
Shared: Visual Novel · Romance · Singleplayer

Emily is Away Too
Shared: Indie · Choices Matter · Casual

风信楼
Shared: Visual Novel · Choices Matter · Multiple Endings

Otaku's Adventure
Shared: Visual Novel · Indie · RPG

Slay the Princess — The Pristine Cut
Shared: Visual Novel · Choices Matter · Romance

Fox Hime Zero
Shared: Visual Novel · Indie · Romance

Suzerain
Shared: Visual Novel · Choices Matter · RPG

OneShot
Shared: Indie · Choices Matter · Singleplayer

Disco Elysium - The Final Cut
Shared: RPG · Choices Matter · Singleplayer

Love Curse: Find Your Soulmate
Shared: Visual Novel · Romance · Choices Matter