Games like Isekai Idle
Games like Isekai Idle include Melvor Idle, DAVE THE DIVER, Touhou Mystia's Izakaya, Dragon Cliff, and Cookie Clicker. We matched them by the tags players give Isekai Idle on Steam (Casual, RPG, Idler, Singleplayer, and JRPG): closest matches first, and among equally close ones the better-known games.

Melvor Idle
Shared: RPG · Casual · Idler

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Singleplayer

Touhou Mystia's Izakaya
Shared: Casual · RPG · Pixel Graphics

Dragon Cliff
Shared: RPG · Idler · Casual

Cookie Clicker
Shared: Idler · Casual · Pixel Graphics

Graveyard Keeper
Shared: RPG · Pixel Graphics · Singleplayer

Stardew Valley
Shared: RPG · Pixel Graphics · Casual

鬼谷八荒 Tale of Immortal
Shared: Singleplayer · RPG · Simulation

Potion Craft: Alchemist Simulator
Shared: Singleplayer · Casual · RPG

Vampire Survivors
Shared: Singleplayer · Casual · Pixel Graphics

Swords and Souls: Neverseen
Shared: RPG · Singleplayer · Idler

Eastward
Shared: Singleplayer · RPG · Pixel Graphics

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Singleplayer · Casual

Idle Champions of the Forgotten Realms
Shared: Idler · Singleplayer · RPG

OCTOPATH TRAVELER™
Shared: RPG · JRPG · Singleplayer

Kingdom Come: Deliverance II
Shared: RPG · Singleplayer · Medieval

Shelldiver
Shared: Casual · Idler · 2D

Impostor Factory
Shared: RPG · Singleplayer · Pixel Graphics

Bloobs Adventure Idle
Shared: Casual · RPG · Idler

Swag and Sorcery
Shared: RPG · Singleplayer · Pixel Graphics

Evoland
Shared: RPG · Singleplayer · JRPG

FINAL FANTASY VI
Shared: RPG · Singleplayer · JRPG

Kingdom Come: Deliverance
Shared: RPG · Singleplayer · Medieval

My Time at Portia
Shared: RPG · Casual · Singleplayer