Games like City-Defence
Games like City-Defence include Bloons TD 6, Plants vs. Zombies GOTY Edition, GemCraft - Chasing Shadows, Kingdom Rush - Tower Defense, and Infested Planet. We matched them by the tags players give City-Defence on Steam (Strategy, Tower Defense, Top-Down, Military, and PvE): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

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

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Top-Down

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

Infested Planet
Shared: Strategy · Tower Defense · Top-Down

Bloons TD 5
Shared: Strategy · Tower Defense · Action

Rock 'N' Roll Defense
Shared: Strategy · Tower Defense · Action

Orcs Must Die! 3
Shared: Tower Defense · Strategy · PvE

Ninja Kiwi Archive
Shared: Strategy · Tower Defense · Casual

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

Door Kickers 2: Task Force North
Shared: Top-Down · Military · Strategy

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

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

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Action

Sir, We Have an Orc Problem
Shared: Tower Defense · Military · PvE

Company of Heroes 3
Shared: Strategy · Singleplayer · PvE

Door Kickers
Shared: Strategy · Top-Down · Action

X-Morph: Defense
Shared: Strategy · Tower Defense · Action

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

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

Dungeon Defenders
Shared: Tower Defense · Strategy · Singleplayer

Anomaly Warzone Earth
Shared: Strategy · Tower Defense · Indie

Defense Grid: The Awakening
Shared: Strategy · Tower Defense · Singleplayer

Squad
Shared: Military · PvE · Action