Single-player games like Idle Monster TD
Below are 9 single-player Steam games similar to Idle Monster TD, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Idle Monster TD page.
Ranked picks
- 1
Idle Hero TD - Tower Defense
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Monster TD.
Endless idle tower defense game full of deep strategy and combat mechanics. Unlock and upgrade dozens of epic fantasy heroes to defeat an infinite swarm of enemy monsters. Strategize hero positions, synergies, and skills for an effective defense, then sit back and let the auto-battler do its thing!
- 2
Monster Hunting: Incremental Grind Forever
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Monster TD.
An idle incremental adventure. Fight monsters, buy upgrades, recruit a party, craft equipment, join a faction, battle across different regions, and complete hundreds of rewards. Unlock a variety of fun features and use them to make your numbers go up!
- 3
Don't Wake the Queen
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Monster TD.
Protect the peaceful sleep of Your Meowness in this ever-growing incremental tower defense. Place defenders, build your own path, unlock new skills and units, infinitely upgrade EVERYTHING and optimize your strategy.
- 4
Idle TD: Heroes vs Zombies
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Monster TD.
An endless Tower Defense game of epic heroes vs evil zombies. Unlock and upgrade countless Heroes, artifacts, and technologies to defend against the infinite zombie swarms. Strategize the most effective placement of Heroes to synergize their skills and abilities.
- 5
Idle Monster TD: Evolved
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Monster TD.
Evolve epic monsters and crush puny humans in this endless idle tower defense game! Unlock, upgrade, and evolve over 150 unique monsters and pets, ranging from cute and colorful flower creatures to epic fire breathing dragons, to assemble the ultimate team against the endless waves of enemies.
- 6
SimPocalypse
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Monster TD.
A civilization simulator where you manage billions of people and rebuild millions of structures. Improve your economy, research, advance, battle, and much more! Play at your own pace by controlling game speed and automate various tasks!
- 7
This Isn't Just Tower Defense
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Casual with Idle Monster TD.
Defend your base with placeable towers that can be upgraded endlessly. Automate your production and make sure there's enough power to keep everything running.
- 8
Goblin Buster: Incremental Tower Defense
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Casual with Idle Monster TD.
Goblin Buster is an incremental tower defense game with deep upgrade mechanics. Obliterate annoying goblins, collect materials, discover powerful relics, invest in unique buildings and spend your resources to upgrade towers and magical spells with a massive skill tree!
- 9
Monster Tiles TD: Tower Wars
Single-player alternative to Idle Monster TD — playable solo, no multiplayer required. Shares Strategy and Indie with Idle Monster TD.
Free Tower Defense game with unique roguelike elements. Custom base building mechanics allow you to create your own base and maze with tiles earned after each wave. Unleash a variety of monsters, each with its own evolution path and unique skills, and evolve them into legendary creatures.