Reactor Defense: TD

Master · Evolve · Adapt

Offline sci-fi tower defense for iPhone and Android. Grow Mastery across runs, evolve 12 turrets, and outthink an AI that adapts to your build.

Get Reactor Defense on Google Play Watch the trailer Get Reactor Defense on the App Store

Lance · piercing beam

Lance turret · piercing beam

12Base turrets

∞Mastery runs

0Pay-to-win

100%Offline

About the game

Machines crawl a pipeline toward your reactor core, and every one that gets through costs core integrity. Place turrets on the open panels, upgrade them, and evolve them into stronger forms to stop each wave before it breaks through.

Reactor Defense: TD is a tower defense game built around long-term progression. Mastery XP carries across runs and unlocks new evolutions, while the enemy AI reads how you build and counters it. The whole game plays offline, with no account and no connection required.

Quick facts

Game: Reactor Defense: TD
Genre: Tower defense, strategy
Platform: iPhone (App Store) and Android (Google Play)
Price: Free with limited ads. A one-time purchase removes them.
Internet: Not required. The whole game plays offline.
Turrets: 12 base turrets that evolve into stronger forms
Progression: Mastery XP carries across every run
Monetization: No pay-to-win
Developer: Roboschnoz Gaming

Why it sticks

Four ideas that keep every run different.

Mastery

Long-term progress that carries across runs.

Evolutions

12 base turrets that evolve into stronger forms.

Adaptive AI

Enemies counter how you build.

Fully offline

Play anywhere, no always-online gate.

See it in action

Screenshots from the game itself.

Reactor Defense: TD mid-wave at wave 36 with a piercing Lance beam cutting through a column of machines — Late waves get loud.

Reactor Defense: TD turret inspect panel showing level, damage, kill stats and upgrade options — Inspect, upgrade and evolve any turret, and see its damage and kill stats.

Reactor Defense: TD Mastery screen with permanent upgrades that carry across runs — Mastery carries across every run.

Reactor Defense: TD Trophy Room listing permanent trophies and their lasting bonuses — Trophies that reward how you play.

Reactor Defense: TD Battle Stats screen with top turrets ranked by kills and damage dealt — Run stats: your deadliest turrets, ranked.

A new layout every run

Unlock the Random map and each run rolls a different path and palette.

Reactor Defense: TD random map with an olive-gold palette and a looping crossing path — Random map, olive.

Reactor Defense: TD random map with a blue palette and a winding path — Random map, blue.

Reactor Defense: TD random map with a purple palette and a long switchback path — Random map, purple.

Fair monetization

Plays fully offline. Limited ads with a one-time option to remove them. No pay-to-win.

Trailer

Shorts

Quick gameplay clips from Reactor Defense: TD.

Questions

Is it free?

Yes. The game is free on the App Store and Google Play with limited ads, and a one-time purchase removes them. There is no pay-to-win.

Does it work offline?

Yes. The whole game plays offline with no account and no always-online requirement.

Is there an iPhone version?

Yes. Reactor Defense is free on the App Store for iPhone, and on Google Play for Android.

Where is my progress saved?

On your device. Nothing is stored on a server, and there is no account to create.

Reactor Defense: TD — Master, Evolve, Adapt. Offline tower defense, no pay-to-win.

Get Reactor Defense on the App Store Get Reactor Defense on Google Play