Games like Zombie Idle Defense
Zombie Idle Defense. These games share the most with it, and each one says why.

Idle Kingdom DefenseDormant
Also idle, tower defense, combat
Command heroes and archer corps in large castle-defense battles, with rewards stacking up while the game is closed.
75% idle
Medieval: Defense & ConquestDormant
Also tower defense, idle, combat
Build a crusader settlement's farms and trade, then spend the income on an army and walls to hold off waves of attackers.

Tower Defense: Lazy ApocalypseUpdated
Also tower defense, idle, combat
Play a monster-slaying streamer holding off zombie waves, upgrading weapons while your hero keeps fighting when you are away.
75% idle
Zero Stress King: Idle DefenseUpdated
Also tower defense, idle
A tower defense where you cannot lose: enemies charge your walls and fall into lava, and you spend the payout on defenders and a map-shaped skill tree.
87% steam3.6★ galaxy
Abyss Manager Idle
Also tower defense, idle
Assign characters to jobs, gather resources and dig deeper floors in an idle tower defense. About two hours to finish completely.
95% steamhas ending
Marisa!ReturnTheBook!
Also idle, combat
A Touhou fan game where you craft Shanghai dolls styled after Gensokyo characters to storm Marisa's house and recover her borrowed books.
90% steam
Slimeward
Also combat, idle
Turn a slime that landed outside your house into resources, building up a village and recruiting heroes strong enough to beat it.
89% steam
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
Pacifish
Also idle, combat
Fish six areas, fight back against what you disturb, hatch and eat fish for stats, and craft poles, playable idly or actively for speed.
84% steam50% idle
Forge MasterDormant
Also idle, combat
Forge gear across eras from the Stone Age to the Quantum Age and battle other players on a leaderboard.

Alien Invasion: RPG Idle SpaceUpdated
Also combat, idle
Guide an alien that eats humans to grow stronger, evolve its abilities and beat bosses in new locations.

Invincible: Guarding the GlobeUpdated
Also combat, idle
Recruit characters from Invincible, merge clones to rank them up, and run idle battles in the background.
75% idle
Gun IdleUpdated
Also idle, combat
Own a shooting range where you unlock dozens of guns, blast breakable targets and stack earnings multipliers into the trillions.

Street Fighter Duel - Idle RPGUpdated
Also idle, combat
Recruit famous Street Fighter characters into a team that keeps getting stronger while you are away.

Epic Stickman: RPG Idle WarUpdated
Also idle, combat
Guide a stickman hero through a shadowy realm, picking a class and gaining power in automatic fights even offline.
75% idle
Hero Making Tycoon Idle GamesDormant
Also idle, combat
Mass produce potato men on a factory line, arm them into soldiers and send them against huge bosses.

Merge Gun: Shoot ZombieDormant
Also idle, combat
Combine identical guns into stronger ones and use them to hold off waves of zombies.

Battle Simulator: Idle WarfareUpdated
Also idle, combat
Recruit fighters from many eras, from Spartans to helicopters, and watch them clash in automatic battles.

Idle Breaker: Zombie SurvivalUpdated
Also idle, combat
Smash through buildings for materials in a zombie wasteland and craft stronger weapons to defend your shelter.

Idle StickmanDormant
Also idle, combat
Run a stickman factory with over 50 fighters and weapons, stacking power-ups to multiply earnings.

Last Stronghold: Idle SurvivalUpdated
Also idle, combat
Build a base after a nuclear zombie outbreak, crafting supplies, recruiting survivors and clearing out the undead.

War Tortoise 2Dormant
Also idle, combat
Pilot a heavily armed tortoise tank across a large world, gearing up with loot, pilots and heroes.

Idle ArmyUpdated
Also idle, combat
Merge soldiers into stronger units and push through waves of drones, ninjas and tanks.

The Tower - Idle Tower DefenseUpdated
Also tower defense, idle
Defend a single tower against waves, buy permanent upgrades and research while idle or active.
50% idle