Games like Firewall
Games like Firewall include Kingdom Rush - Tower Defense, Kingdom Rush 5: Alliance TD, Plants vs. Zombies GOTY Edition, Thronefall, and Kingdom Rush Vengeance - Tower Defense. We matched them by the tags players give Firewall on Steam (Action, Strategy, Tower Defense, 2D, and Minimalist): closest matches first, and among equally close ones the better-known games.

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

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

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · 2D

Thronefall
Shared: Strategy · Tower Defense · Action

Kingdom Rush Vengeance - Tower Defense
Shared: Strategy · Tower Defense · 2D

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

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Bloons TD 5
Shared: Strategy · Tower Defense · Action

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

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

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

Infested Planet
Shared: Strategy · Action · Tower Defense

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

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

Kingdom Rush 6: Genesis TD
Shared: Strategy · Action · Tower Defense

Kingdom Two Crowns
Shared: Tower Defense · Minimalist · Strategy

The Escapists
Shared: Strategy · 2D · Action

Buckshot Roulette
Shared: Strategy · Dark · Indie

Gunpoint
Shared: 2D · Action · Indie

Taur
Shared: Strategy · Action · Tower Defense

Tangy TD
Shared: Strategy · Action · Tower Defense

Your Only Move Is HUSTLE
Shared: Action · Strategy · 2D

Mini Metro
Shared: Strategy · Minimalist · Indie

ShellShock Live
Shared: Strategy · Action · 2D

