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Air Defender

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Air Defender

ROTOR3 · Published by ROTOR3 · Official site ↗

Mostly Positive — 79% positive (378 reviews)

Last updated 28 Sept 2026

Command the sky in a tense real-time strategy simulation where you manage a nation's air defenses. Analyze radar contacts, scramble interceptor jets, and make split-second decisions to protect your airspace from hostile threats.

Early AccessDJCTQ l

£14.81

Lowest price we've ever recorded

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Price history

5 Sept 2026Lowest: £14.81 · Highest: £14.8110 Oct 2026

Indie, Simulation, Strategy, Early Access, Casual · 2025 · More £5 - £15 games

Air Defender challenges you to command and protect your airspace as a tense real-time strategy simulation. Analyze threats and deploy interceptors to safeguard against hostile incursions, all while navigating the complexities of managing air defenses.

About this game

TAKE COMMAND OF THE NATION'S AIR DEFENSE

The sky is your battlefield. A hostile contact appears on radar. Is it a civilian airliner off course, or the prelude to a full-scale attack? Your job is to find out.

Air Defender is a high-stakes, real-time strategy simulation that puts you in the command chair of a national Air Defence network. From a top-down strategic view, you are the unseen hand responsible for detecting, identifying, and intercepting airborne threats. This is not a dogfighting game; you are not a pilot. You are the commander with access to the capabilities of multiple roles in the bunker, and the fate of the nation rests on your split-second decisions.

Analyse radar returns, scramble your Quick Reaction Alert (QRA) fighters, and manage your assets to protect your airspace. Every choice matters, and the consequences of failure are devastating.

Key Features

  • High-Fidelity Command & Control: Take on the role of an Air Defense Commander. Manage a detailed radar network, interpret IFF (Identification Friend or Foe) data, and issue commands to your forces.

  • Scramble QRA Interceptors: Launch your fighter aircraft to investigate, shadow, or engage hostile contacts. Manage their fuel, weapons, and mission objectives in real-time.

  • Deep Information Warfare: Utilise authentic-inspired systems to build a complete picture of the battlespace. Monitor flight plans, analyse electronic warfare (EW) intelligence, and stay one step ahead of the enemy.

  • Intelligent Enemy AI: Face a dynamic adversary that will probe your defenses, launch coordinated attacks, and adapt to your strategy, creating a challenging and replayable experience.

  • Play Endless or complete Training Missions to become Combat Ready. In Endless, you will be challenged to spot the bad guys, ensure they don't sneak through, if you do, it could lead to all out war.

Welcome to the command center. The watch is yours.

System Requirements

Will my PC run this? →

Minimum

Minimum:
  • OS: Windows 10 version 2004 or later (64-bit)
  • Processor: 4‑core CPU, e.g., Intel Core i3‑6100 / i5‑4570 or AMD Ryzen 3 1200
  • Memory: 8 GB RAM
  • Graphics: DirectX 11–compatible GPU with 1 GB VRAM (e.g., Intel HD 4000+, NVIDIA GTX 600 series+, AMD HD 7000 series+)
  • DirectX: Version 11
  • Storage: 1 GB available space

Recommended

Recommended:
  • OS: Windows 10 22H2 / Windows 11 (64-bit)
  • Processor: 6‑core CPU, e.g., Intel Core i5‑9600K / i5‑10400 or AMD Ryzen 5 3600 (or newer)
  • Graphics: NVIDIA GTX 960/1050 Ti or AMD RX 560 (or better) with 2 GB+ VRAM.

Supported Languages

English*
*languages with full audio support

Latest news

  • Patch NotesOfficial

    Bug Fixes & Additions

    Air Defender Changelog - Version 0.7.0.0 - 23 May 2026 A major reliability and polish update covering interceptor behaviour, voice and radio procedure, save and load, map settings, scoring, civilian and emergency handling, and difficulty options.New: Difficulty-Scaled Fuel ConsumptionInterceptor fuel burn now adapts to your selected difficulty setting.Hard: Realistic period-accurate baseline (unchanged).Normal: Half rate — interceptor sortie endurance doubles.Easy: One-tenth rate — extended endurance for relaxed sessions.Warnings Unchanged: Joker, Bingo, PAN-PAN and MAYDAY warnings still trigger at the same fuel percentages — they just take proportionally longer to reach.Save & Load ReliabilitySaves Survive Process Kill: Saves are now written safely — closing the game (or losing power) part-way through a save no longer leaves a corrupted file behind. The previous slot's contents remain intact until the new save is fully written.Rapid SAVE Click Safety: Clicking SAVE rapidly no longer risks two saves overwriting each other.Corrupted Save Entries Visible in Load Menu: Saves with malformed files no longer silently disappear from the Load Game list — they are shown with an error indicator so you can spot them and choose to delete.Save Game Click Reliability: Loading a save no longer silent-fails when the on-disk filename differs from the in-game display name.Mid-Mission State Preservation: Save/load now correctly preserves a wide range of mid-flight state: AWACS approach gates, tanker fuel-flow rates, Nimrod departure-leg sequencing, enemy aircraft RTB position, enemy bomber turn state and evasion timers, in-flight missile guidance parameters, nuclear weapon damage profiles, and many smaller details that previously reset to defaults on load.Chinook Supply Missions Survive Save/Load: In-flight Chinook HC2 supply aircraft no longer disappear seconds after loading a save — cargo, ordnance, and origin-base accounting are all preserved.Crash Sequence No Longer Loops On Load:...
    Read full article on Community Announcements (steam)
  • Patch NotesOfficial

    Hotfix - Version 0.6.9.102

    A focused hotfix bundle covering radar reliability, Russian deception polish, and engagement procedure correctness. Radar & Track Reliability - Radar Toggle No Longer Destroys Aircraft: Switching a radar off no longer permanently removes the enemy aircraft it had been tracking. Aircraft state and radar state are now properly independent — turning the radar back on, or another sensor picking the aircraft up, correctly redisplays them on the map. - EW-Identified Raids Persist: Enemy raids spotted by EW intelligence (e.g. bombers inbound from far north of UK radar cover) no longer disappear after about 20 seconds. The radar map now keeps EW-flagged Hostile raids visible for as long as EW continues to report them. - Hostile Classification Survives Radar Cycle: Toggling a radar off and back on no longer loses a Russian spoofer's known-hostile classification. A spoofer that has been correctly identified will not silently revert to "Unknown civilian" after a radar power cycle. Russian Deception - Spoofers Trigger Full Intercept Procedure: When a Russian aircraft using a civilian airline callsign (e.g. Iran Air) is intercepted, the QRA fighters now correctly run the full Russian intercept procedure (visual identification → challenge → engagement or escort) automatically once they reach the merge. The procedure no longer goes silent if the spoofer's civilian disguise hasn't yet been visually identified. Engagement Procedure - Critical Tension Auto-Engage On Hostile Confirmation: In Critical tension, QRA interceptors that visually confirm a contact as hostile now correctly switch to Engage instead of continuing the standard intercept procedure. The "ENGAGING" radio call plays at the moment the interceptor confirms the hostile, not after a manual override.
    Read full article on Community Announcements (Knackers)
  • Patch NotesOfficial

    Bug Fixes & Additions

    Air Defender Changelog - Version 0.6.9.94 - May 2026 A large bundle of fixes covering campaign endings, the end-of-game summary and soundtrack, the identification procedure on Hard difficulty, Russian deception, stuck aircraft, AWACS and interceptor reliability, civilian traffic during airspace closure, and a long tail of quality-of-life issues.Campaign End & Summary Screen- Critical Campaign Won't End After The First Wave: Clearing the opening wave no longer ends a Critical campaign early — victory waits until the full assault has been spent.- "All Threats Cleared" Fires At The Right Time: The all-clear message now waits until every enemy has left the map, every inbound bomb has detonated, and any queued waves have finished spawning.- Airspace Stays Closed Until It's Really Empty: Airspace no longer reopens while escort fighters are still in the air — it waits for every enemy aircraft to clear, not just the bombers.- Honest Victory Framing: The end-of-game summary now tells the truth about cost — "DEFENCE SUCCEEDED" only for clean wins, with "DEFENCE HELD — AT GREAT COST" or "NATION DEVASTATED — DEFENCE HELD" for higher-casualty outcomes.- No More Duplicate Cities In The Summary: Cities hit more than once are listed once with a strike count, instead of repeating with the same casualty number on every row.- Submarine Debug Panel Hidden During Armageddon: The launch debug panel no longer overlays the formal end-of-game screen.Hard Difficulty Identification Procedure- Procedure Bonus Now Awarded For Hostiles: Identifying a hostile aircraft (TU-95, spoofer, military) using the full 4-step procedure now correctly awards the procedure-followed bonus instead of unfairly penalising you. Hostile aircraft don't have a Mode 3 code, so ATC will reply "no Mode 3 code assigned" — that response now correctly counts as the ATC step.- Procedure Guide Rewritten: The Help / Guide Procedures tab now spells out the full 5-step identification sequence in order, calls out the ATC hotkey ...
    Read full article on Community Announcements (steam)
  • Patch NotesOfficial

    Bug Fixes & Additions

    Air Defender Changelog - Version 0.6.8.49 - April 2026 This is a major update bringing enemy variety, a comprehensive intelligence reporting system, an expanded Guide panel, intercept status updates, shift handover, supply coaching, and dozens of fixes across interceptors, radar, voice, and training.New: Enemy Variety SystemEnemy aircraft now employ a wider range of deception tactics. What you see on your radar may not be what it appears. Intelligence reports from various sources across the UK will help you identify threats -- pay attention to the clues. Difficulty setting affects how challenging these encounters are to detect.New: Intel ReportsThe ASMA console now posts intelligent, data-driven reports from across the UK.- Real Aircraft Data: Every observer report -- RAF veterans, air cadets, coastguard, police, North Sea oil rig crews, ATC squadrons, GCHQ -- references the contact's actual altitude, speed, heading, and approach direction. Reports never contradict your radar picture.- Expertise-Aware Language: RAF veterans use proper military terminology. Civilians describe what they see. Air cadets check their Jane's guides. The source shapes how it's written.- Contact Positions: Every report includes where the contact is (e.g., "30nm north of Edinburgh"), so you can correlate sightings with tracks.- ATC Call Intelligence: CALL ATC now includes a RELATED INTELLIGENCE section -- observer sightings, SIGINT assessments, registry checks, and ATC anomalies for the queried track.- Your Squadron: 849 real RAF Air Cadet squadron numbers and locations across 34 Wings are included. When an enemy aircraft overflies your town, your squadron may be the one to spot it.- Radar-Gated IDO: The Identification Officer only reports contacts visible on the radar scope. Aircraft beyond coverage are reported by maritime and ground observers, not the IDO.New: Guide PanelThe Guide panel has expanded from 9 to 12 tabs with comprehensive coverage of game mechanics.- Overview: Game setting, ...
    Read full article on Community Announcements (steam)
  • Patch NotesOfficial

    Bug Fixes & Additions

    Air Defender Changelog - Version 0.6.0.1 - March 2026This is a major update bringing a completely new coaching and mentoring system, comprehensive ASMA console upgrades, training mission improvements, a hidden easter egg, and hundreds of stability and performance fixes under the hood. New: Coaching and Mentoring System Your ASMA console now acts as an intelligent mentor, giving you real-time feedback tailored to your experience level. FOR YOU Feed: A new dedicated coaching feed in ASMA delivers situation-aware tips based on what is happening in your watch. Hints scale with your XP — beginners get step-by-step guidance, experienced operators get concise reminders.Controller Handover Brief: When you start a new session or load a save, you now receive a handover brief summarising the current air picture, active sorties, fuel and weapons status, and threat assessment — just like a real controller shift change.Session Performance Tracking: Your performance is tracked across each session. When you next log in, your handover brief includes a supervisor assessment covering identification accuracy, resource management, and decision making from your previous watch.Training Mission Mentor: Training missions now feature a dedicated mentor who provides state-aware hints. If you are stuck, the mentor nudges you toward the next step rather than leaving you guessing.Bear Hunt Tanker Hint: A three-tier hint system now nudges you to deploy a tanker after launching QRA in the Bear Hunt mission, progressing from gentle suggestion to direct instruction.New: ASMA Console Overhaul The ASMA console has been significantly upgraded with new filtering, categorisation, and message quality improvements. Category Filters: Filter ASMA messages by category — Sortie, Intel, Supply, ATC, Alerts, and more. Click the category buttons at the top of the console to focus on what matters.Sortie Sub-Filters: When filtering by Sortie, individual sortie buttons appear. Click one to see only that sortie's mes...
    Read full article on Community Announcements (steam)

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