Games like Mushroom Musume
Games like Mushroom Musume include Volcano Princess, Magical Princess, Yes, Your Grace, Stardew Valley, and Undertale. We matched them by the tags players give Mushroom Musume on Steam (Life Sim, RPG, Cute, Text-Based, and Fantasy): closest matches first, and among equally close ones the better-known games.

Volcano Princess
Shared: Life Sim · RPG · Choices Matter

Magical Princess
Shared: Life Sim · RPG · Choices Matter

Yes, Your Grace
Shared: RPG · Choices Matter · Life Sim

Stardew Valley
Shared: Life Sim · RPG · Pixel Graphics

Undertale
Shared: RPG · Choices Matter · Pixel Graphics

Roadwarden
Shared: RPG · Text-Based · Adventure

Fields of Mistria
Shared: RPG · Life Sim · Cute

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Fantasy · Adventure

Growing Up
Shared: Life Sim · RPG · Choices Matter

Little Witch in the Woods
Shared: Cute · Life Sim · RPG

Sun Haven
Shared: Life Sim · RPG · Pixel Graphics

Baldur's Gate 3
Shared: RPG · Choices Matter · Fantasy

DRAPLINE
Shared: RPG · Cute · Pixel Graphics

OneShot
Shared: Cute · Pixel Graphics · Choices Matter

Reigns
Shared: Life Sim · Choices Matter · RPG

BAD END THEATER
Shared: LGBTQ+ · Cute · Multiple Endings

Dragon Age: Origins - Ultimate Edition
Shared: RPG · Fantasy · Choices Matter

Travellers Rest
Shared: Life Sim · RPG · Pixel Graphics

The Witcher 2: Assassins of Kings Enhanced Edition
Shared: RPG · Fantasy · Choices Matter

My Time at Portia
Shared: Life Sim · RPG · Adventure

Princess Maker: Children of Revelation
Shared: Life Sim · Fantasy · Cute

Graveyard Keeper
Shared: RPG · Pixel Graphics · Simulation

Princess Maker 2 Refine
Shared: RPG · Life Sim · Cute

Chinese Parents
Shared: Life Sim · RPG · Simulation