Games like Idle Dragon Realm
Games like Idle Dragon Realm include Melvor Idle, Idle Champions of the Forgotten Realms, A Dance of Fire and Ice, Kingdom Rush - Tower Defense, and Cookie Clicker. We matched them by the tags players give Idle Dragon Realm on Steam (Idler, Singleplayer, 2D, Casual, and Indie): closest matches first, and among equally close ones the better-known games.

Melvor Idle
Shared: Idler · Casual · Singleplayer

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

A Dance of Fire and Ice
Shared: Singleplayer · 2D · Indie

Kingdom Rush - Tower Defense
Shared: Singleplayer · 2D · Casual

Cookie Clicker
Shared: Idler · Casual · Indie

Kingdom Rush Frontiers - Tower Defense
Shared: 2D · Singleplayer · Strategy

Plants vs. Zombies GOTY Edition
Shared: Singleplayer · Casual · 2D

Game Dev Tycoon
Shared: Indie · Singleplayer · Casual

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

Path of Idle: Old Gods Rising
Shared: Idler · Casual · Indie

Keep on Mining!
Shared: Idler · Casual · Singleplayer

A Game About Feeding A Black Hole
Shared: Casual · Idler · Indie

Plague Inc: Evolved
Shared: Singleplayer · Indie · Strategy

Geometry Dash
Shared: 2D · Singleplayer · Level Editor

Loot of Baal
Shared: Idler · Singleplayer · Party-Based RPG

Dragon Cliff
Shared: Idler · Casual · Strategy

Circle Empires
Shared: Casual · Indie · Singleplayer

Kingdom Rush Origins - Tower Defense
Shared: 2D · Singleplayer · Casual

Kingdom Rush 5: Alliance TD
Shared: 2D · Singleplayer · Strategy

Zup! S
Shared: Casual · 2D · Indie

To The Core
Shared: 2D · Casual · Singleplayer

BEEP
Shared: Indie · 2D · Singleplayer

Timber Rush
Shared: Idler · Casual · Indie

Reus
Shared: Singleplayer · Indie · Casual