Single-player games like Tower Defense: Defender of the Kingdom
Below are 16 single-player Steam games similar to Tower Defense: Defender of the Kingdom, 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 Tower Defense: Defender of the Kingdom page.
Ranked picks
- 1

Tower Defense Hero
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.
A game combining tower defense and RPG
- 2

God of Failure
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.
Defend your castle from the orcish chavs, lure them into your traps and destroy them.
- 3

Castle Combat
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Casual with Tower Defense: Defender of the Kingdom.
RTS, but the soldiers will act automatically: Each soldier has different characteristics/attribute values/action methods. Choose the appropriate soldiers and buildings according to the battlefield situation, and destroy the opponent's castle only through your strategy rather than operation!
- 4

Zenteni
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy with Tower Defense: Defender of the Kingdom.
Build, conquer and collect puzzles.
- 5

GemCraft - Legacy Collection
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.
Experience the original three GemCraft games in one collection. GemCraft 1, GemCraft 0, and GemCraft Labyrinth! Forge and combine magical gems, build deadly defenses, and survive relentless waves in one of the most beloved Flash-era tower defense series!
- 6

GemCraft - Frostborn Wrath
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.
The epic tower defense dark fantasy journey continues! Create powerful gems with various abilities and take on the battle against an endlessly flowing army of monsters, and face the growing darkness as you fight your way back towards the Spiritforge.
- 7

The King is Watching
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.
The King is Watching is a roguelite kingdom builder. Rule by the power of your royal gaze! Decide between producing resources, training armies, or balancing both, while adapting to unique events every run
- 8

Element TD 2 - Tower Defense
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.
Element TD 2 sees you combine powerful elements to create unique towers. Prove your defenses against challenging foes, and compete or cooperate with others to determine who has mastered the elements.
- 9

Forklift: Simulator
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.
Forklift: Simulator is a realistic forklift simulator where you have to carefully transport fragile cargo from one place to another!
- 10

Logistic Expert
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.
Logistics Expert is a modern tycoon simulator for managing a logistics company and heavy equipment with realistic physics!
- 11

Ballista Legend
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie and Casual with Tower Defense: Defender of the Kingdom.
Ballista Legend is a funny action-puzzler with the ballista in beautiful worlds. 100 spectacular levels are wating for you!
- 12

Parking 3D
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.
Parking 3D is an amazing car parking simulator where you have to park different cars with highest precision!
- 13

Mahjong: Magic Chips
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie and Casual with Tower Defense: Defender of the Kingdom.
Mahjong: Magic Chips is a sweet board game where you have to destroy all the same tiles as soon as possible!
- 14

Crossroads Extreme
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie and Casual with Tower Defense: Defender of the Kingdom.
Crossroads Extreme is a cute arcade simulator where you should manage driving traffic in the most accurate way to avoid a car crash and carmageddon!
- 15

Crafting Block World
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.
Crafting Block World is an adventure with sandbox elements that will help you build your ideal world!
- 16

Elite Soldier: 3D Shooter
Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required.
Where the special forces can not cope — one soldier and a rifle will achieve the goal.