Games like The Necromancer Cometh! TD
Games like The Necromancer Cometh! TD include Mindustry, Kingdom Two Crowns, Kingdom Rush 5: Alliance TD, Kingdom Rush 6: Genesis TD, and Thronefall. We matched them by the tags players give The Necromancer Cometh! TD on Steam (Tower Defense, Base Building, Automation, Deckbuilding, and Strategy): closest matches first, and among equally close ones the better-known games.

Mindustry
Shared: Base Building · Tower Defense · Automation

Kingdom Two Crowns
Shared: Tower Defense · Base Building · Medieval

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

Kingdom Rush 6: Genesis TD
Shared: Tower Defense · Strategy · Base Building

Thronefall
Shared: Tower Defense · Strategy · Base Building

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

Age of Darkness: Final Stand
Shared: Tower Defense · Base Building · Strategy

The King is Watching
Shared: Base Building · Tower Defense · Strategy

Factorio
Shared: Base Building · Automation · Strategy

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

They Are Billions
Shared: Base Building · Strategy · Tower Defense

Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Strategy · Medieval

Emberward
Shared: Tower Defense · Strategy · Base Building

Rogue Tower
Shared: Tower Defense · Strategy · Base Building

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

Kingdom Rush Vengeance - Tower Defense
Shared: Tower Defense · Strategy · Medieval

Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer

Orcs Must Die!
Shared: Tower Defense · Strategy · Fantasy

GemCraft - Chasing Shadows
Shared: Tower Defense · Strategy · Fantasy

Grim Nights
Shared: Tower Defense · Base Building · Strategy

Border Pioneer
Shared: Tower Defense · Base Building · Strategy

Nordhold
Shared: Tower Defense · Strategy · Base Building

shapez
Shared: Base Building · Automation · Strategy

Diplomacy is Not an Option
Shared: Base Building · Medieval · Tower Defense