Games like Defend the Dragon Palace!
Games like Defend the Dragon Palace! include Rise to Ruins, METAL SLUG ATTACK RELOADED, Reus, Kingdom Two Crowns, and Totally Accurate Battle Simulator. We matched them by the tags players give Defend the Dragon Palace! on Steam (Strategy, Simulation, Tower Defense, God Game, and Auto Battler): closest matches first, and among equally close ones the better-known games.

Rise to Ruins
Shared: Tower Defense · Strategy · Simulation

METAL SLUG ATTACK RELOADED
Shared: Strategy · Tower Defense · Simulation

Reus
Shared: Strategy · God Game · Simulation

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Fantasy

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Singleplayer

WorldBox - God Simulator
Shared: Simulation · God Game · Pixel Graphics

The Escapists
Shared: Strategy · Simulation · Pixel Graphics

911 Operator
Shared: Strategy · Simulation · Singleplayer

Ages of Conflict: World War Simulator
Shared: Simulation · God Game · Strategy

Plague Inc: Evolved
Shared: Strategy · Simulation · Singleplayer

Papers, Please
Shared: Simulation · Pixel Graphics · Indie

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Teamfight Manager
Shared: Simulation · Strategy · Auto Battler

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Fantasy

Creeper World 3: Arc Eternal
Shared: Strategy · Tower Defense · Simulation

Dungeon Warfare 3
Shared: Strategy · Tower Defense · Simulation

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Tower Defense · Fantasy

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Fantasy

Warpips
Shared: Strategy · Tower Defense · Auto Battler

Simmiland
Shared: Simulation · God Game · Strategy

Plants vs. Zombies GOTY Edition
Shared: Strategy · Tower Defense · Singleplayer

Ultimate Epic Battle Simulator 2
Shared: Simulation · Strategy · God Game

Total War: WARHAMMER II
Shared: Strategy · Fantasy · Singleplayer

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · Strategy · Auto Battler