Games like Emperor Kingdom
Games like Emperor Kingdom include Age of Darkness: Final Stand, Kingdom Rush - Tower Defense, Melvor Idle, Plants vs. Zombies GOTY Edition, and Bloons TD 6. We matched them by the tags players give Emperor Kingdom on Steam (Casual, Tower Defense, RTS, Action RTS, and Idler): closest matches first, and among equally close ones the better-known games.

Age of Darkness: Final Stand
Shared: Tower Defense · RTS · Action RTS

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

Melvor Idle
Shared: Casual · Idler · Singleplayer

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

Bloons TD 6
Shared: Tower Defense · Casual · Singleplayer

Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Casual · Singleplayer

Thronefall
Shared: Tower Defense · Action RTS · Medieval

Diplomacy is Not an Option
Shared: RTS · Medieval · Tower Defense

Space Rock Breaker
Shared: Casual · Idler · Top-Down

GemCraft - Frostborn Wrath
Shared: Tower Defense · RTS · Top-Down

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

Warstone TD
Shared: Tower Defense · Fantasy · RTS

Kingdom Two Crowns
Shared: Tower Defense · Medieval · Fantasy

Circle Empires
Shared: Casual · RTS · Fantasy

The King is Watching
Shared: Tower Defense · RTS · Fantasy

Creeper World 3: Arc Eternal
Shared: Tower Defense · RTS · Singleplayer

Idle Champions of the Forgotten Realms
Shared: Idler · Fantasy · Casual

Keep on Mining!
Shared: Casual · Idler · Singleplayer

Cookie Clicker
Shared: Casual · Idler · Indie

Zero Stress King: Idle Defense
Shared: Tower Defense · Casual · Idler

Desktop Defender
Shared: Tower Defense · Idler · Casual

Border Pioneer
Shared: Tower Defense · RTS · Medieval

Oriental Dynasty - Silk Road defense war
Shared: Tower Defense · Casual · RTS