How to Download Air Defender

1. Click on the Air Defender download button below.
2. Choose "Install" to install the game on the windows steam client.
3. Follow the on-screen prompts
4. Let it download the Full Version.
5. Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.

1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."

Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.

Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.

2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.

3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.

4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.

Windows Pc Requirements

Minimum:

• OS: Windows 10 (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:

• OS: Windows 10/11 (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.

Linux Requirements

No minimum requirements!!
No maximum requirements!!

Mac Requirements

No minimum requirements!!
No maximum requirements!!

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.

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.

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