Games like Necroffense
Games like Necroffense include Book of Yog Idle RPG, Kingdom Rush - Tower Defense, Bloons TD 6, Plants vs. Zombies GOTY Edition, and Dota Underlords. We matched them by the tags players give Necroffense on Steam (Strategy, Tower Defense, Hack and Slash, Auto Battler, and Wargame): closest matches first, and among equally close ones the better-known games.

Book of Yog Idle RPG
Shared: Auto Battler · Hack and Slash · Simulation

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

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

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

Dota Underlords
Shared: Strategy · Auto Battler · Casual

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

Ultimate Epic Battle Simulator 2
Shared: Strategy · Simulation · Wargame

Thronefall
Shared: Strategy · Tower Defense · Action

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

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

Warpips
Shared: Strategy · Tower Defense · Auto Battler

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

Totally Accurate Battle Simulator
Shared: Strategy · Simulation · Singleplayer

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

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

Crown Siege
Shared: Tower Defense · Auto Battler · Hack and Slash

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

Ninja Kiwi Archive
Shared: Strategy · Tower Defense · Casual

Toy Soldiers
Shared: Strategy · Tower Defense · Simulation

Plague Inc: Evolved
Shared: Strategy · Simulation · Casual

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Fantasy

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

Creeper World 4
Shared: Tower Defense · Wargame · Strategy

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