Games like Miss Agatha's Palace
Games like Miss Agatha's Palace include Undertale, LoveChoice, Baldur's Gate 3, I Wani Hug that Gator!, and The Henry Stickmin Collection. We matched them by the tags players give Miss Agatha's Palace on Steam (Romance, RPG, Choose Your Own Adventure, Party-Based RPG, and Dating Sim): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: RPG · Choices Matter · Funny

LoveChoice
Shared: Romance · Dating Sim · Choices Matter

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

I Wani Hug that Gator!
Shared: Romance · Choose Your Own Adventure · Dating Sim

The Henry Stickmin Collection
Shared: Choose Your Own Adventure · Funny · Multiple Endings

Matchmaking Inc.
Shared: RPG · Dating Sim · Romance

OMORI
Shared: RPG · Story Rich · 2D

Otaku's Adventure
Shared: Dating Sim · RPG · Funny

Love Is All Around
Shared: Dating Sim · Romance · RPG

Legend of Mortal
Shared: RPG · Choices Matter · Dating Sim

Dispatch
Shared: Romance · Choices Matter · Choose Your Own Adventure

Ten Trials of Babel: The Doppelganger Maze
Shared: RPG · Choose Your Own Adventure · Multiple Endings

To the Moon
Shared: Romance · RPG · Story Rich

Finding Paradise
Shared: RPG · 2D · Story Rich

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

Solasta: Crown of the Magister
Shared: RPG · Top-Down · Party-Based RPG

Hooked on You: A Dead by Daylight Dating Sim™
Shared: Romance · Choose Your Own Adventure · Dating Sim

Emily is Away <3
Shared: Dating Sim · Choices Matter · Multiple Endings

DELTARUNE
Shared: RPG · Funny · Story Rich

Volcano Princess
Shared: RPG · Dating Sim · Choices Matter

Slay the Princess — The Pristine Cut
Shared: Romance · Choose Your Own Adventure · Choices Matter

LISA: The Painful
Shared: RPG · Party-Based RPG · Story Rich

Emily is Away Too
Shared: Dating Sim · Choices Matter · RPG

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