Read the threat. Build the counter.

Last Firewall is a large-scale tactical tower defense game. You are the final defense commander of City42 — coordinating rooftop weapons, electronic warfare, power infrastructure, and specialist operators while a machine offensive closes on the last protected core.

42Waves

7Defense systems

9Hostile families

6Routes

4Sectors

52Defense zones

1Final core

The core loop

Every wave is a decision

Combat is deterministic and explainable. The game always tells you why a defense can or cannot be placed, what it targets, its current range — and why an attack succeeded or failed.

01 — Read

Read the wave

Scout incoming composition, entry direction, and route pressure. Armor, air, and digital threats each demand different answers.

02 — Place

Place and power

Fifty-two rooftop and infrastructure zones, eight placement clusters, thirteen long-range anchors. Every position competes for credits and grid power.

03 — Hold

Hold the line

Interrupt hacks, break shields, intercept skimmers, and keep substations alive. A lost sector changes power, routes, and pressure on the next line.

04 — Decide

Retreat or retake

Retreat is always your call — never automatic. Earn a line-break opportunity and you can recapture the last lost adjacent sector.

A contested industrial gate with wrecked machine hulls stacked at a defended chokepoint. — Contested gate, industrial perimeter — final vision concept

Economy

Credits are strategy

Starting resources are limited. Kills and held waves generate rewards. Upgrading a defense competes directly with placing a new one, and selling returns only a controlled fraction of the investment.

Long-range anchors cover multiple approaches but never solve the whole map. Route convergence rewards late-line efficiency, while outer districts reward early interception and economy. Support systems are deliberately bounded — there is no infinite stacking layout.

A scarred but recaptured district at sunrise, defense crews rebuilding positions among the damage. — Recaptured sector at sunrise — final vision concept

Modes

Three ways to defend

Campaign — the complete offline operation: four connected sectors, forty-two waves, milestone Command Engine encounters at waves 10, 20, 30, and 42.

Timed Operation — a thirty-minute defense built for one sitting. Endless — hold as long as your line and economy survive.

Deterministic combat, save and resume, full replays, and shareable challenge seeds run through every mode. Mobile-first tactical readability, desktop-quality presentation.

See the campaign Explore City42

Go deeper

Seven systems. Nine threats.

Every defense has a counter it owns and a weakness it cannot cover. Study the arsenal, then read the enemy files.

The defense arsenal Enemy intelligence