Last War: Alert Tower Guide – Upgrades & Strategy

Last update : 03/11/2026

Last War Survival Alert Tower

Want to crush your enemies in Last War: Survival? Then you need to master the Alert Tower! This crucial building keeps your base safe. Also, it reveals your opponent’s secrets. Let’s dive into how to maximize its potential.

Understanding the Alert Tower 💡

The Alert Tower is your first line of defense. It’s available once your Headquarters reaches level 10. Essentially, it acts as a radar. It detects incoming troops and protects your intel. Upgrading it boosts your scouting abilities. Besides, it also hides your base details from prying eyes. Therefore, strategically upgrading your Alert Tower is crucial.

How Scout Level and Hidden Info Work Together 🧊

Here’s the deal: your Alert Tower has two key stats. Scout Level determines how much info you gather when scouting. Hidden Info Count reduces an enemy’s Scout Level against you.

  • Scout Level: The higher, the better intel you get.
  • Hidden Info Count: This stat protects your base. It lowers the effective Scout Level of attackers.

For example, a Level 22 Alert Tower has a Scout Level of 14. It also has a Hidden Info Count of 5. So, an enemy with a Level 22 tower scouting you would see: 14 – 5 = Scout Level 9 intel. Therefore, your base is partly protected.

Important Note: You cannot upgrade the Hidden Info Count until your Headquarters reaches level 22.

Alert Tower Upgrade Guide: Level by Level 📈

Here’s a detailed breakdown of Alert Tower upgrades. Plan your resource spending!

Level Iron Food Coin Upgrade Time (Approx.) Power Anti-Scout Probability Hidden Info Count Scout Level Scout Information
1 13 13 3s 600 0% 0 1 Basic Scout Info
5 160,000 160,000 1h 48m 14s 3,000 100% 1 1 Basic Scout Info
10 1,000,000 1,000,000 130,000 9h 13m 39s 9,500 100% 5 2 Squad Power
15 5,000,000 5,000,000 640,000 19h 52m 2s 23,300 100% 5 7 Decoration Power
20 44,000,000 44,000,000 5,600,000 4d 10h 51m 2s 56,900 100% 5 12 Drone Level
25 210,000,000 210,000,000 27,000,000 19d 4h 6m 37s 134,800 100% 5 17 Exclusive Weapon Level
30 1,100,000,000 1,100,000,000 130,000,000 88d 14h 32m 32s 314,300 100% 5 22 Details of Units in Hospital

Pro Tip: The resource costs listed are base values.
Research and other bonuses can reduce the final cost.
Therefore, always check your actual in-game costs.

Level 30 and Beyond (Age of Oil) 🔥

In Season 2, the “Age of Oil” expansion unlocks even higher levels. First, research “HQ Expansion” to access them. The costs skyrocket. However, the benefits are immense.

Level Iron Food Coin Oil Power Anti-Scout Probability Hidden Info Count Scout Level Scout Information
31 1,200,000,000 1,200,000,000 150,000,000 450,000 365,800 100% 5 22 Details of Units in Hospital
35 1,500,000,000 1,500,000,000 200,000,000 4,406,400 571,800 100% 5 22 Details of Units in Hospital

Maximizing Your Alert Tower 🏆

  • Prioritize Upgrades: Focus on the Alert Tower early. A strong defense is key.
  • Strategic Scouting: Use your Scout Level wisely. Target weaker bases first. Then work your way up.
  • Hidden Info is King: Protect your base from advanced scouts.
  • Adapt and Evolve: As the game changes, adjust your strategies. Always optimize your Alert Tower.

FAQs

Q: When can I build the Alert Tower?

A: At Headquarters level 10.

Q: Does the Anti-Scout Probability guarantee I won’t be scouted?

A: No, it just means enemy scouts get less info.

Q: What’s the best level to upgrade my Alert Tower to?

A: Max it out ASAP! The higher, the better.

Q: How does Hidden Info Count work against higher-level scouts?

A: It reduces their effective Scout Level.

Q: Are there other buildings that affect scouting?

A: Yes, research and hero skills can also play a role.

Q: Should I focus on offense or defense first?

A: Balance is best. However, a strong defense is always a good investment.

Conclusion

The Alert Tower is a game-changer in Last War: Survival. Upgrade it consistently. Use its scouting and anti-scouting abilities. Then you will dominate the battlefield!

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Learn more about Last War on the official website.

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