Games like Idle Monster TD
Idle Monster TD leans idle, never really ends. These games share the most with it, and each one says why.

Legends of Monster:Idle RPGDormant
Also animals, combat · Same active/idle balance (leans idle)
Start as a baby dinosaur and grow into a giant city-smashing monster, upgrading stats through auto battles that continue while you are logged off.
75% idle
Tap Wizard 2
Also elements, combat · Same active/idle balance (leans idle)
A wizard caught in a time loop fights waves automatically while you choose spells, perks and traits before each rewind.
76% steam70% idle
Incremental Adventures
Also combat · Same active/idle balance (leans idle)
Heroes fight on their own in automated turn-based combat while you tune the automation and push toward double-exponent numbers through stacked prestiges.
78% steam70% idle
Idle Kingdom DefenseDormant
Also tower defense, combat · Same active/idle balance (leans idle)
Command heroes and archer corps in large castle-defense battles, with rewards stacking up while the game is closed.
75% idle
Tower Defense: Lazy ApocalypseUpdated
Also tower defense, combat · Same active/idle balance (leans idle)
Play a monster-slaying streamer holding off zombie waves, upgrading weapons while your hero keeps fighting when you are away.
75% idle
Idle Hero TD - Tower Defense RPGUpdated
Also tower defense · 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
The Perfect Tower II
Also tower defense · Same active/idle balance (leans idle)
Tower defence as an idle engine, plus factories, mining and an in-game scripting language.
87% steam60% idle
Idle Monster TD: Evolved
Also tower defense · Same active/idle balance (leans idle)
A reverse tower defense where you evolve over 150 monsters to hold a portal against endless human invaders, placing them to combine abilities.
76% steam75% idle
XiuzhenWorld
Also animals, combat
Cultivate from mortal to immortal in a 3D world, capturing monster pets to fight alongside you and letting an AFK mode grind.
77% steamhas ending50% idle
Unnamed Space Idle
Also combat · Same active/idle balance (leans idle)
A ship, a sector map and a tidy prestige loop. Quietly one of Galaxy's most-played games.
92% steam4.5★ galaxy70% idle
All Aboard! The Train Defense Express
Also tower defense, combat
Defend a power generator from waves of orcs with a looping train, buying combat and gold-making carriages and merging three alike to level them.
91% steam
Joyquarium
Also animals · Same active/idle balance (leans idle)
Raise fry until they are big enough to sell, keep adults in the tank for steady income, and open packs to unlock 144 species. An auto mode lets the tank run on its own.
97% steam70% idle
Progress Game
Also combat · Same active/idle balance (leans idle)
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
Time Is Honey
Also animals · Same active/idle balance (leans idle)
Open packs of bees, care for them in real time, and sell their honey. Over 150 bee types to collect, plus hives and accessories to customize.
91% steam70% idle
Bao Bao's™ Cozy Laundromat
Also animals · Same active/idle balance (leans idle)
Help a panda turn 500 coins into a busy laundromat by buying washers, decorating and hiring panda helpers, set to lo-fi music while it runs in the background.
88% steam70% idle
The Adventure of NAYU
Also animals · Same active/idle balance (leans idle)
Click to help a fox and her party fight through a gentle, short story, spending star shards on training and costumes, with an endless mode afterward.
95% steamhas ending75% idle
Grow Defense
Also tower defense, combat
Level a castle's weapons and skills to hold back monsters across zones, chase rare drops from raid bosses and rebirth for permanent perks.
77% steam
War Tortoise
Also combat, animals
Ride a giant battle tortoise across an open world, summoning rodent and beetle units, collecting heroes and pilots, and fishing for permanent abilities.
80% steam
Endless Frontier - RPGUpdated
Also combat · Same active/idle balance (leans idle)
Lead a squad of knights and mages up thousands of stages against titans and dragons, with units that keep climbing and leveling on their own while you are away.
75% idle
Chonkers
Also animals · Same active/idle balance (leans idle)
Adopt stray cats, play with them while they fatten up, then rehome them for gold. The goal is filling a book of over 100 breeds, including rare space cats.
84% steam70% idle
The Girl's Moving Castle
Also combat · Same active/idle balance (leans idle)
A fantasy idle RPG where you gather and raise companions for turn-based battles, with AFK growth and daily reward collection taking a few minutes a day.
86% steam70% idle
MyVoiceZoo
Also animals · Same active/idle balance (leans idle)
Record your own voice as animal calls, and each cry in your zoo earns income to adopt more animals, with little need for active play.
92% steam75% idle
miniBONG
Also combat · Same active/idle balance (leans idle)
A light roguelike where a fashion-styled fighter battles on autopilot, and you focus on outfits, character growth and difficulty tiers.
80% steam70% idle
Transport Defender
Also combat · Same active/idle balance (leans idle)
Guard a cargo ship from boarding waves with a turret and auto weapons, scripting auto upgrades and auto ascension for long idle runs.
80% steam70% idle