Games like Legends of IdleOn
Legends of IdleOn mostly idle, never really ends. These games share the most with it, and each one says why.

Bloobs Adventure Idle
Also skilling, rpg, deep · Same active/idle balance (leans idle)
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
Evitania Online - Idle RPG
Also mmo, rpg, skilling · Same active/idle balance (leans idle)
An online idle RPG with classes and talent trees where your character fights and gathers while offline, and alts can level mining and woodcutting.
78% steam75% idle
Melvor Idle
Also rpg, skilling · Same active/idle balance (mostly idle)
RuneScape's skilling loop distilled into menus. Train twenty skills, fight dungeons, fill the completion log.
90% steam85% idle
Idle ClansUpdated
Also mmo, skilling, rpg · Same active/idle balance (leans idle)
A multiplayer idle RPG where you pick a task and your character trains around 20 skills even while you are offline, with a player economy and clans.
74% steam75% idle
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
IdleOn - Idle RPGUpdated
Also rpg, skilling, deep · Same active/idle balance (mostly idle)
Manage a whole roster of characters who keep fighting while you are gone, choosing among 19 classes and leveling skills like farming, sailing and construction.
90% idle
Idle IktahUpdated
Also skilling, rpg · Same active/idle balance (leans idle)
An idle skilling RPG set in the Pacific Northwest, with local wildlife, minigames, moon-phase item effects, a real tide tracker and offline progress.
76% steam75% idle
iMMOUpdated
Also mmo, rpg, skilling
A browser idle MMORPG with a multiplayer server, featuring skills, equipment, inventory, trading and stage objectives.

Scapewatch: Idle MMO
Also mmo, skilling · Same active/idle balance (leans idle)
Queue tasks across 30 skills, close the tab, and your character keeps gathering, fighting and training offline. Clans, raids and hiscores round out the grind.
86% steam75% idle
Idling to Rule the Gods
Also rpg · Same active/idle balance (leans idle)
Train clones, fight gods, rebirth. An old-school Unity idler that still has a loyal crowd.
85% steam75% idle
Lord of IdleUpdated
Also rpg, skilling, mmo
An idle action RPG with Combat, Mining and Crafting skills, loot hunting, multiplayer boss rooms, an isometric factory and monthly leaderboard seasons.
2.9★ galaxy
Eldara
Also skilling, rpg · Same active/idle balance (leans idle)
A dark fantasy idle RPG with 17 linked skills from fishing to cremation, a pet for each mastered skill, and a world that keeps progressing while you are away.
81% steam75% idle
Idle Hacking: An Inaction RPG
Also mmo, rpg · Same active/idle balance (leans idle)
A text-based hacking MMO where you craft affix-heavy gear, join player syndicates and join daily world bosses, with progress running for hours after logout.
80% steam75% idle
Screeps: World
Also mmo, deep · Same active/idle balance (leans idle)
Run a colony in a persistent MMO by writing JavaScript that controls your units around the clock, even while you are logged off.
87% steam70% idle
Koltera 2
Also skilling, rpg · Same active/idle balance (leans idle)
Level gathering and crafting skills, summon over 120 creatures to automate them, and send teams on expeditions, with all progress continuing offline.
78% steam75% idle
Theory of Magic (Arcanum)
Also rpg, deep
A text-heavy mage's apprenticeship with hundreds of spells, classes and dungeons. Dense, charming, community-kept.
4.5★ galaxy45% idle
Firestone Idle RPG
Also rpg · Same active/idle balance (mostly idle)
A big, polished free-to-play hero idler with guilds, expeditions and a lot of timers.
77% steam80% 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
Between Adventures IDLE
Also rpg, skilling · Same active/idle balance (leans idle)
A pixel-art idle RPG where you watch your hero fight, then train 11 gathering and crafting skills, enchant gear and shape a skill tree. Progress continues offline.
68% steam75% idle
BitburnerUpdated
Also deep · Same active/idle balance (leans idle)
A cyberpunk incremental where you write real JavaScript to hack servers and automate everything.
95% steam70% idle
Vespera
Also rpg, skilling · Same active/idle balance (leans idle)
A class-based idle RPG with subclass talent trees, gathering and crafting, mercenary expeditions, and factions that fight world bosses with other players. Full offline progress.
63% steam75% idle
Idle Hero TD - Tower Defense RPGUpdated
Also rpg · Same active/idle balance (leans idle)
An endless tower defense where you recruit and place fantasy heroes against infinite waves, and they keep fighting and collecting rewards while the game is closed.
82% steam75% idle
Milky Way Idle
Also mmo, skilling · Same active/idle balance (leans idle)
A multiplayer RPG with RuneScape-style gathering, production, and combat skills, repeating actions automatically, plus a player market and chat.
3.7★ galaxy70% idle
Hero Tale
Also rpg, skilling · Same active/idle balance (mostly idle)
A background auto-battler: a hero fights across a fantasy island while you check in to spend points in a 300-node skill tree and swap loot.
71% steam90% idle