The Alert Tower is the scouting and intelligence building in Last War Survival. It unlocks when your Headquarters reaches level 10, warns you about troops marching toward your base, determines how much information your scouts can see, and helps conceal information from enemy scouts.
For players searching for Last War Alert Tower levels, the most important milestones are level 5 for the listed 100% Anti-Scout Probability, level 9 for Hidden Info Count 5, level 10 for Scout Level 2 and Squad Power information, level 20 for Drone Level, level 25 for Exclusive Weapon Level, and level 30 for Scout Level 22 and detailed Hospital unit information. Levels 31–35 require Age of Oil progression but do not currently add another Scout Level.
★Quick Take: Scout Level is the offensive side of the Alert Tower: higher levels reveal more information about a target. Hidden Info Count is the defensive side: it reduces the effective Scout Level of an enemy scouting your base. From a scouting perspective, level 30 is the final current information milestone because levels 31–35 remain at Scout Level 22.
What Does the Alert Tower Do in Last War?
The Alert Tower becomes available at Headquarters level 10. If you are still progressing toward that requirement, the Last War Headquarters upgrade guide covers the wider HQ progression path.
The building has three closely related functions:
- Incoming troop detection: It provides warning and information about marches approaching your base.
- Scouting: Its Scout Level determines which categories of information you can obtain when scouting another commander.
- Information protection: Hidden Info Count reduces the effective Scout Level of an enemy scout targeting you.
The Alert Tower is therefore useful on both offense and defense, but it is an intelligence building rather than a direct combat building. Upgrading it will not replace strong heroes, troops, research, gear, or defensive preparation.
How Scout Level and Hidden Info Count Work
Scout Level and Hidden Info Count are easiest to understand as opposing values.
- Scout Level: Determines which intelligence categories your scout can potentially reveal.
- Hidden Info Count: Reduces the effective Scout Level of another player scouting your base.
For example, an Alert Tower at level 22 has Scout Level 14 in the current progression table. If the target has Hidden Info Count 5, the effective intelligence level becomes:
14 Scout Level − 5 Hidden Info Count = effective Scout Level 9
The scout would therefore receive information corresponding to Scout Level 9 rather than the full Scout Level 14 report.
Current public level tables list Hidden Info Count at 0 for Alert Tower level 1, 1 at levels 2–5, 2 at level 6, 3 at level 7, 4 at level 8, and 5 from level 9 onward.
What Does Anti-Scout Probability Mean?
Anti-Scout Probability is a separate Alert Tower stat. The current level table lists 0% at level 1, 40% at level 2, 60% at level 3, 80% at level 4, and 100% from level 5 onward.
Do not interpret the 100% figure as proof that your base becomes completely impossible to scout. Public databases clearly list the stat but do not consistently document every detail of how it interacts with the information shown in reports. Hidden Info Count and the opposing player’s Scout Level remain the more useful values for understanding how much intelligence can be revealed.
Last War Alert Tower Levels and Upgrade Costs
The following tables focus on the information players most often need when planning Alert Tower upgrades: base Iron, Food and Coin costs, Hidden Info Count, Scout Level, and the new intelligence unlocked.
!Important: These are base resource values from current community-maintained upgrade tables. Your displayed requirement can differ when account bonuses or cost reductions apply. Public databases also disagree on some construction times, so check the live upgrade screen before committing resources or speedups.
Alert Tower Levels 1–9
The first nine levels primarily improve the defensive side of the Alert Tower. Scout Level remains at 1, while Hidden Info Count reaches its listed maximum of 5 at level 9.
| Alert Tower Level | Iron | Food | Coin | Anti-Scout Probability | Hidden Info Count | Scout Level | Scout Information |
|---|---|---|---|---|---|---|---|
| 1 | 13 | 13 | – | 0% | 0 | 1 | Basic Scout Info |
| 2 | 49,000 | 49,000 | – | 40% | 1 | 1 | Basic Scout Info |
| 3 | 66,000 | 66,000 | – | 60% | 1 | 1 | Basic Scout Info |
| 4 | 89,000 | 89,000 | – | 80% | 1 | 1 | Basic Scout Info |
| 5 | 160,000 | 160,000 | – | 100% | 1 | 1 | Basic Scout Info |
| 6 | 410,000 | 410,000 | – | 100% | 2 | 1 | Basic Scout Info |
| 7 | 660,000 | 660,000 | – | 100% | 3 | 1 | Basic Scout Info |
| 8 | 730,000 | 730,000 | – | 100% | 4 | 1 | Basic Scout Info |
| 9 | 910,000 | 910,000 | 120,000 | 100% | 5 | 1 | Basic Scout Info |
Alert Tower Levels 10–30 and Scout Unlocks
Alert Tower level 10 is where Scout Level begins increasing. From this point through level 30, almost every upgrade adds another type of intelligence to your scout report.
| Alert Tower Level | Iron | Food | Coin | Hidden Info Count | Scout Level | New Scout Information |
|---|---|---|---|---|---|---|
| 10 | 1,000,000 | 1,000,000 | 130,000 | 5 | 2 | Squad Power |
| 11 | 2,100,000 | 2,100,000 | 270,000 | 5 | 3 | Gear Details |
| 12 | 3,000,000 | 3,000,000 | 380,000 | 5 | 4 | Skill Details |
| 13 | 3,100,000 | 3,100,000 | 390,000 | 5 | 5 | Wall of Honor Power |
| 14 | 3,600,000 | 3,600,000 | 460,000 | 5 | 6 | Wall of Honor Details |
| 15 | 5,000,000 | 5,000,000 | 640,000 | 5 | 7 | Decoration Power |
| 16 | 8,900,000 | 8,900,000 | 1,100,000 | 5 | 8 | Decoration Details |
| 17 | 12,000,000 | 12,000,000 | 1,500,000 | 5 | 9 | Tech Power |
| 18 | 20,000,000 | 20,000,000 | 2,600,000 | 5 | 10 | Tech Progress |
| 19 | 24,000,000 | 24,000,000 | 3,100,000 | 5 | 11 | Drone Power |
| 20 | 44,000,000 | 44,000,000 | 5,600,000 | 5 | 12 | Drone Level |
| 21 | 61,000,000 | 61,000,000 | 7,800,000 | 5 | 13 | Drone Component Level |
| 22 | 79,000,000 | 79,000,000 | 10,000,000 | 5 | 14 | Drone Chip Type |
| 23 | 99,000,000 | 99,000,000 | 13,000,000 | 5 | 15 | Drone Chip Level |
| 24 | 120,000,000 | 120,000,000 | 16,000,000 | 5 | 16 | Drone Chip Star Level |
| 25 | 210,000,000 | 210,000,000 | 27,000,000 | 5 | 17 | Exclusive Weapon Level |
| 26 | 300,000,000 | 300,000,000 | 38,000,000 | 5 | 18 | Total Unit Count |
| 27 | 380,000,000 | 380,000,000 | 49,000,000 | 5 | 19 | Unit Details |
| 28 | 540,000,000 | 540,000,000 | 69,000,000 | 5 | 20 | Unit Buffs |
| 29 | 750,000,000 | 750,000,000 | 96,000,000 | 5 | 21 | Hospital Capacity |
| 30 | 1,100,000,000 | 1,100,000,000 | 130,000,000 | 5 | 22 | Details of Units in Hospital |
Alert Tower Levels 31–35 in the Age of Oil
After the warzone reaches the Age of Oil following Season 2, buildings can progress beyond level 30. Access to these levels requires the relevant HQ Expansion research in the Age of Oil research tree.
Alert Tower levels 31–35 introduce Oil to the resource requirement. However, the current progression data keeps Hidden Info Count at 5, Scout Level at 22, and Scout Information at “Details of Units in Hospital” throughout all five levels.
| Level | Iron | Food | Coin | Oil | Hidden Info Count | Scout Level | Scout Information |
|---|---|---|---|---|---|---|---|
| 31 | 1,200,000,000 | 1,200,000,000 | 150,000,000 | 450,000 | 5 | 22 | Details of Units in Hospital |
| 32 | 1,300,000,000 | 1,300,000,000 | 160,000,000 | 720,000 | 5 | 22 | Details of Units in Hospital |
| 33 | 1,400,000,000 | 1,400,000,000 | 180,000,000 | 1,224,000 | 5 | 22 | Details of Units in Hospital |
| 34 | 1,500,000,000 | 1,500,000,000 | 190,000,000 | 2,203,200 | 5 | 22 | Details of Units in Hospital |
| 35 | 1,500,000,000 | 1,500,000,000 | 200,000,000 | 4,406,400 | 5 | 22 | Details of Units in Hospital |
Because levels 31–35 do not add new scout information in the current data, their value should be judged against your wider Age of Oil progression rather than scouting alone.
Community databases can lag behind live game tuning, so always confirm the final resources and prerequisites on your own upgrade screen. You can also follow game announcements through the official Last War website.
Which Alert Tower Levels Should You Prioritize?
You cannot skip Alert Tower levels, but the major information breakpoints help you decide how aggressively to invest in the building compared with Headquarters, troop buildings, research, and other progression systems.
✓Recommendation: Active PvP players gain the most from keeping the Alert Tower progressing because levels 10–30 continually add useful intelligence. More development-focused or resource-limited players can treat those scout unlocks as planning milestones and avoid sacrificing higher-priority HQ, research, troop, or recovery upgrades simply to rush the tower.
Early Alert Tower: Levels 1–9
These levels mainly improve information protection rather than the amount of intelligence you collect. Anti-Scout Probability reaches its listed 100% value at level 5, while Hidden Info Count continues increasing until it reaches 5 at level 9.
If resources are tight, remember that reaching level 9 does not yet improve Scout Level beyond 1. The offensive scouting progression begins at level 10.
Mid-Game Alert Tower: Levels 10–18
This is where upgrades begin providing increasingly useful intelligence. You progress from Squad Power to gear, skill, Wall of Honor, decoration, and technology information.
These details are particularly helpful when two bases have similar visible power but very different underlying development.
Drone and Exclusive Weapon Milestones: Levels 19–25
Levels 19–24 progressively reveal Drone Power, Drone Level, component information, and Drone Chip development. Level 25 adds Exclusive Weapon Level.
For developed servers, these details can matter considerably because two formations with similar hero levels and headline power may have very different drone, chip, or Exclusive Weapon investment.
Unit and Hospital Intelligence: Levels 26–30
The final pre-Age of Oil scouting levels focus directly on troops:
- Level 26: Total Unit Count
- Level 27: Unit Details
- Level 28: Unit Buffs
- Level 29: Hospital Capacity
- Level 30: Details of Units in Hospital
For serious PvP, these can be among the most actionable reports because they reveal more about the target’s available military strength and recovery situation rather than only account-development statistics.
Age of Oil: Levels 31–35
From a pure scouting perspective, levels 31–35 provide less incremental value because Scout Level remains at 22 and the listed report information does not change.
That does not make these upgrades useless, but the high Iron, Food, Coin, and Oil costs mean you should compare them with other Age of Oil priorities before committing resources.
How to Use Alert Tower Scout Information
A scout report should answer a practical question: is this target worth attacking with the formation and support I currently have?
Do not make that decision from one statistic alone. Compare all of the information your current Scout Level allows you to see.
- Squad Power: A useful first comparison, but not a complete measure of combat performance.
- Gear and skills: Two similarly powered squads can perform differently when their hero development is uneven.
- Wall of Honor and decorations: These systems can reveal additional long-term account investment.
- Technology: Strong research can make a formation more dangerous than its headline power suggests.
- Drone development: Power, level, components, and chips become increasingly visible at higher Scout Levels.
- Exclusive Weapons: Level 25 scouting adds another useful indicator of developed hero investment.
- Unit information: Levels 26–28 expose progressively more troop-related intelligence.
- Hospital information: Levels 29 and 30 can help you judge a target’s recovery capacity and current wounded-unit situation.
For more detail on the statistics that influence actual combat strength, see the Last War troop stats guide.
Alert Tower Strategy for Attacking
Scout Before Committing Your Main Formation
Against another active player, scouting gives you information that a world-map power number cannot. Use the report before committing an important march whenever the game situation gives you time to do so.
Compare Several Progression Systems
A target with lower visible power can still be dangerous when its primary squad, technology, drone, gear, or unit buffs are heavily developed. The higher your Alert Tower, the easier it becomes to identify these mismatches before attacking.
Remember That Scout Reports Are a Snapshot
A player’s situation can change after you scout. Troops may return, reinforcements can arrive, formations can change, and wounded units can be healed. Treat older reports cautiously when attacking an active base.
Consider Alliance Position
Even a favorable individual matchup may become poor if the target is surrounded by active alliance members. Intelligence about the base itself should be combined with what is happening around it on the map.
How to Use the Alert Tower on Defense
The Alert Tower provides intelligence, not direct protection. When it warns you about an incoming march, use the available time to decide how the rest of your account should respond.
Depending on the situation and the rules of the current event or mode, your options may include preparing a defensive formation, requesting alliance support, protecting vulnerable resources or troops, using an available shield, or repositioning.
Your Wall and combat formations still handle the actual defense. The Alert Tower’s job is to give you information early enough to make a better decision.
Recovery planning matters as well. Heavy PvP can generate wounded troops quickly, so keep your Last War Hospital development in line with the amount of fighting you expect to do.
Common Alert Tower Mistakes
- Assuming total power tells you everything: Higher Scout Levels exist because account strength comes from many systems beyond one power number.
- Ignoring Hidden Info Count: Your displayed Scout Level does not guarantee that every target will reveal information up to that level.
- Assuming 100% Anti-Scout means nobody can scout you: Do not confuse the listed Anti-Scout Probability stat with complete immunity from the scouting system.
- Rushing levels 31–35 purely for scouting: The current progression table does not add another Scout Level beyond level 30.
- Using stale reports: Troops, Hospital status, reinforcements, and formations can change after your scout returns.
- Spending resources without comparing priorities: Late Alert Tower upgrades become expensive and compete with other important buildings and research.
- Treating intelligence as a guaranteed win: A report improves your decision-making but cannot account for every combat variable or change that occurs after scouting.
Is the Alert Tower Worth Upgrading?
Yes, especially for players who participate regularly in PvP. Levels 10–30 continually unlock additional intelligence, making the Alert Tower more useful as accounts become more complicated and power alone becomes a less reliable indicator of strength.
For free-to-play and low-spending players, that does not mean the Alert Tower should always take priority over your Headquarters, Tech Center, troop progression, or Hospital. Its value comes from helping you make better decisions; it does not directly compensate for an underdeveloped fighting force.
At level 30, the Alert Tower reaches Scout Level 22 in current progression data. Levels 31–35 continue increasing building progression and resource investment but do not currently reveal a new category of scouting information.
Alert Tower and Overall Account Progression
Scouting becomes more valuable as the rest of an account develops. Better intelligence can help you avoid poor attacks, identify vulnerable targets, and react earlier when another player marches toward your base, but its usefulness depends on having the military strength and recovery capacity to act on that information.
Players who would rather begin with more developed infrastructure can optionally browse Last War accounts for sale. Check the individual listing’s Headquarters, heroes, research, troop progression, and building levels rather than assuming an account includes a particular Alert Tower level.
FAQs
What level does the Alert Tower unlock in Last War?
The Alert Tower becomes available when your Headquarters reaches level 10.
What are the most important Last War Alert Tower levels?
Key milestones include level 5 for the listed 100% Anti-Scout Probability, level 9 for Hidden Info Count 5, level 10 for Scout Level 2 and Squad Power, level 20 for Drone Level, level 25 for Exclusive Weapon Level, and level 30 for Scout Level 22 and detailed Hospital unit information.
At what Alert Tower level does Scout Level start increasing?
Scout Level remains at 1 through Alert Tower level 9. Alert Tower level 10 increases it to Scout Level 2 and adds Squad Power to the available scouting information. It then increases by one per Alert Tower level through level 30.
How does Hidden Info Count work in Last War?
Hidden Info Count reduces the effective Scout Level of a player scouting your base. For example, Scout Level 14 against Hidden Info Count 5 produces an effective Scout Level of 9 for determining the intelligence available to the scout.
What is the maximum Scout Level from the Alert Tower?
Current progression tables list Scout Level 22 at Alert Tower level 30. Alert Tower levels 31 through 35 remain at Scout Level 22 and continue showing “Details of Units in Hospital” as the highest listed scout information.
What are the requirements for Alert Tower levels 31–35?
These levels are part of Age of Oil progression after Season 2. You need access to the relevant HQ Expansion research, and Alert Tower upgrades beyond level 30 require Oil in addition to Iron, Food, and Coin. Check the live game interface for your final requirements before upgrading.
Conclusion
The Alert Tower is worth developing because each level from 10 through 30 gives scouts progressively better intelligence, while early upgrades improve your information protection. For most players, level 30 is the key long-term scouting target because it reaches Scout Level 22; levels 31–35 currently add no new scout category.
Balance those upgrades with your Headquarters, troops, research, defenses, and Hospital rather than treating the Alert Tower as a standalone priority. For more building guides, event strategies, and progression advice, visit the Heaven Guardian Last War Survival guides.
