Games like Theory of Magic (Arcanum)
Theory of Magic (Arcanum) balanced, never really ends. These games share the most with it, and each one says why.

NGU Idle
Also rpg, deep
Joke-dense RPG idler with dozens of interlocking systems. Beating a boss is the easy part; allocating energy is the game.
96% steam65% idle
The Climb - Demo
Also rpg, magic · Same active/idle balance (balanced)
Demo of an incremental RPG about climbing a monster-filled tower, with crafting, growing equipment, enchant cards, quests, and automatic combat.
4.5★ galaxy50% idle
Dragon Cliff
Also rpg, deep · Same active/idle balance (balanced)
A semi-idle party RPG built around deep itemization: 25 classes, talent trees, reforging, and battles that run on their own until you spend rage.
89% steam50% idle
懒人修仙传
Also text, rpg, magic
A tiny text idler where you rise from mortal to immortal by choosing skills, pets and loot, with alchemy and beast taming side systems. Chinese-language store text.
60% steam70% idle
Wizard And Minion Idle
Also rpg, magic · Same active/idle balance (balanced)
A wizard trains stats, casts spells and raises a pet minion, with fishing, gem crafting, dungeons and reincarnation mixed into one long grind.
90% steam50% idle
Legends of IdleOn
Also rpg, deep
An idle MMO with a whole account of characters working different skills at once. Massive, sprawling, social.
77% steam80% idle
Bloobs Adventure Idle
Also rpg, deep
A RuneScape-style idle RPG with 24 linked skills, automated boss fights, soul collecting and skill prestige, plus banked offline time to spend later.
88% steam75% idle
Incremental Epic Hero 2
Also rpg, deep
Six heroes battle automatically across a fantasy world while you upgrade nearly everything and juggle many prestige systems, with over 1,000 hours of content.
72% steam
Idle Slayer
Also rpg · Same active/idle balance (balanced)
A runner-platformer bolted onto an idle economy. Jump for coins when you're around; let it grind when you're not.
84% steam45% idle
Realm Grinder
Also deep · Same active/idle balance (balanced)
Pick a faction, build a kingdom, abdicate, reincarnate, ascend. Every run changes which of eleven factions is optimal.
87% steam55% idle
修炼成仙
Also text, rpg
A minimal text cultivation game: create a character and it fights, loots, and trains on its own from its first steps toward ascension and rebirth.
71% steam90% idle
Clicker Heroes
Also rpg
Click monsters, hire heroes, ascend, transcend. The game that made idle RPGs mainstream on Steam.
90% steam60% idle
Master Healer Kale with useless party
Also rpg, magic
Play the healer of a hopeless party, keeping them alive with spells and a 200-node skill tree until they can face the Demon King in about four hours.
95% steam4.0★ galaxyhas ending
PokéClickerUpdated
Also rpg · Same active/idle balance (balanced)
A fan-made clicker that walks every region, with breeding, dungeons and an enormous collection to fill.
50% idle
Progress Game
Also rpg, magic
Fight monsters, gather materials and cook, then craft three tiers of gear across two worlds. Built to run in the background while you check in for quick upgrades.
92% steam70% idle
Ballad of Heroes
Also rpg, text
A mostly text-based RPG idler set in Greek mythology. Build a party of up to two heroes and four gods and fight to defend Olympus.
4.5★ galaxy
Kittens GameUpdated
Also deep · Same active/idle balance (balanced)
Run a civilisation of kittens from catnip fields to space elevators. Deep, slow, and endlessly spreadsheetable.
55% idleTrimpsDormant
Also deep · Same active/idle balance (balanced)
Breed an army of trimps, push through zones, portal back, and optimise your heirlooms for another hundred runs.
55% idle
Tap Titans 2
Also rpg · Same active/idle balance (balanced)
Tap titans, recruit heroes, prestige. The mobile heir to the Clicker Heroes formula.
50% idle
xiuzhen idle
Also magic, text
A combat-free cultivation sim: raise stats through alchemy, planting and other arts, climbing realms from qi refining to divinity.
79% steam70% idle
SynergismUpdated
Also deep
Five prestige layers stacked like a tower, each one reshaping the ones below. For people who liked AD and want more.
75% steam60% idle
BitburnerUpdated
Also deep
A cyberpunk incremental where you write real JavaScript to hack servers and automate everything.
95% steam70% idle
Clicker GuardiansDormant
Also rpg · Same active/idle balance (balanced)
A voxel fantasy clicker where you fight monsters yourself or let guild companions do it, then craft and refine gear to push through stages and bosses.
68% steam50% idle
Reincarnated as a Dark Lord Before Taking Over the World with Power 999999999
Also rpg, magic
A short idle RPG where a reborn dark lord picks branching paths across lives, with shadow servants to automate and several endings.
4.0★ galaxyhas ending