Games like Coastal Defense
Games like Coastal Defense include Plants vs. Zombies GOTY Edition, Bloons TD 6, Kingdom Rush - Tower Defense, Kingdom Rush Frontiers - Tower Defense, and Kingdom Rush Origins - Tower Defense. We matched them by the tags players give Coastal Defense on Steam (Casual, Tower Defense, Military, Historical, and 2D): closest matches first, and among equally close ones the better-known games.

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

Bloons TD 6
Shared: Tower Defense · Casual · Strategy

Kingdom Rush - Tower Defense
Shared: Tower Defense · Casual · 2D

Kingdom Rush Frontiers - Tower Defense
Shared: Tower Defense · 2D · Casual

Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Casual · 2D

Vampire Survivors
Shared: Bullet Hell · 2D · Casual

Game Dev Tycoon
Shared: Casual · 2D · Strategy

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

Apocalypse Party
Shared: Casual · Top-Down Shooter · Singleplayer

Bloons TD 5
Shared: Tower Defense · Casual · Strategy

Company of Heroes 3
Shared: Strategy · Singleplayer · PvE

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

Battle Ranch: Pigs vs Plants
Shared: Casual · Tower Defense · 2D

20 Minutes Till Dawn
Shared: Bullet Hell · Top-Down Shooter · Casual

Call to Arms - Gates of Hell: Ostfront
Shared: Historical · Strategy · Military

Hearts of Iron IV
Shared: Historical · Military · Strategy

Minimalist Tower Defense
Shared: Tower Defense · 2D · Strategy

Oriental Dynasty - Silk Road defense war
Shared: Tower Defense · Casual · 2D

Europa Universalis IV
Shared: Historical · Military · Strategy

Heroes of the Three Kingdoms 7
Shared: Military · 2D · Strategy

Kingdom Rush 5: Alliance TD
Shared: Tower Defense · 2D · Strategy

Total War: EMPIRE – Definitive Edition
Shared: Military · Historical · Strategy

SHOOPER NOVA
Shared: Casual · Tower Defense · Bullet Hell

Total War: THREE KINGDOMS
Shared: Historical · Military · Strategy