Games like Firework War
Games like Firework War include Plants vs. Zombies GOTY Edition, Bloons TD 6, Rogue Tower, Kingdom Rush - Tower Defense, and Kingdom Rush Frontiers - Tower Defense. We matched them by the tags players give Firework War on Steam (Casual, Strategy, Tower Defense, Funny, and Abstract): closest matches first, and among equally close ones the better-known games.

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

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Rogue Tower
Shared: Strategy · Tower Defense · Casual

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

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

Balatro
Shared: Strategy · Roguelike · Casual

Mini Motorways
Shared: Strategy · Casual · Minimalist

Cluckmech Oasis
Shared: Strategy · Tower Defense · Roguelike

Slots & Daggers
Shared: Casual · Strategy · Roguelike

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

The King is Watching
Shared: Tower Defense · Strategy · Roguelike

Vampire Survivors
Shared: Casual · Roguelite · Roguelike

Nodebuster
Shared: Casual · Strategy · Abstract

Dota 2
Shared: Strategy · Free to Play · RTS

Tangy TD
Shared: Strategy · Tower Defense · Funny

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

Wall World
Shared: Tower Defense · Strategy · Roguelite

Lines X
Shared: Casual · Strategy · Minimalist

Cookie Clicker
Shared: Casual · Funny · Strategy

Sudoku Universe / 数独宇宙
Shared: Casual · Strategy · Minimalist

Game Dev Tycoon
Shared: Strategy · Casual · Indie

Bad North: Jotunn Edition
Shared: Tower Defense · Minimalist · RTS

Defend Your Life: TD
Shared: Casual · Tower Defense · Strategy

Battle Ranch: Pigs vs Plants
Shared: Strategy · Casual · Tower Defense