Last Fortress: Underground – The Ultimate Guide

June Reyes
Last Fortress: Underground - intro

Last Fortress: Underground is a fantastic strategy, zombie survival game published by LIFE IS A GAME LIMITED where you must live underground in order to create a thriving community away from the prying eyes of your hungry enemies.

Inside your underground fortress, you must construct buildings, collect resources, rescue other survivors, and even plan sieges on fortresses run by other players to survive.

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In this guide, we will show you everything you need to know to help you thrive as a beginner in Last Fortress: Underground. Remember—all great survivors will make it to the end!

Surviving In A Zombie-Infested World (The Basics)

There are three basic facets of Last Fortress: Underground that you must learn and master during your first few days as a beginner: 

  • Resource Collection
  • Building Construction
  • Combat

Resource Collection in this game is arguably the most important task all beginners must learn to do consistently.

A big part of the game revolves around you upgrading both your heroes and your buildings, which you can do by collecting a variety of resources we’ll discuss further below.

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Knowing how Building Construction works is also very important. You can’t just place buildings in this game wherever you like, nor can you build or upgrade anything without gathering the resources required.

Make sure you’re collecting enough resources to construct buildings, as well as upgrade them. 

Also, remember to place ladders appropriately around your base so your workers can go wherever you want them to go.

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Combat is very straightforward in Last Fortress: Underground. There are two types of Heroes in this game—Combat Heroes and Worker Heroes.

Combat Heroes do all the fighting, so make sure you invest in them before you send them out to battles.

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In these battles, Combat Heroes use their normal attacks and skills automatically. This means their combat power will determine if they’ll be victorious, and not necessarily any kind of tactic.

Most Important Resources And How To Get Them

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Listed below are all the resources that you must actively farm right from the beginning to ensure that you’ll have plenty of them later in the game.

You’ll be able to find more sources of these items later on, but all that’s listed below will help you out the most during the early stages of the game.

Resource #1: Food 

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Food is very important as it determines the mood of your survivors, which then determines their productivity level.

The more food you have, the faster they work and vice versa, so make sure you’re collecting enough food as a beginner by:

  • Collecting Gophers
  • Collecting Mushrooms
  • Collecting Wheat 

Resource #2: Power

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Power in Last Fortress: Underground determines the amount of energy your base has left. 

Without it, you won’t be able to access a few key buildings or use the “Rapid” feature which hastens the production of resources. Therefore, you must get Power by:

  • Constructing Gopher Wheels
  • Constructing Power Generators

Resource #3: Iron

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Iron is one of the two resources mainly used for constructing and upgrading buildings.

You can never have enough Iron, so make sure you’re farming them religiously early on by:

  • Mining Iron Mines inside your Fortress
  • Collecting Iron Boxes
  • Collecting Iron Ores when excavating
  • Sending out Heroes on dispatch to Iron Mines outside your Fortress

Resource #4: Stone

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Stones, like Iron, are mainly used for constructing buildings and upgrading them. 

You use more Stones than Iron later in the game, so you’ll need to build a large stockpile of it even early on by:

  • Mining Stone Quarries inside your Fortress
  • Collecting Stone Boxes
  • Collecting Stones when excavating
  • Sending out Heroes on dispatch to Stone Quarries outside your Fortress

Resource #5: Hero Recruitment Point

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Hero Recruitment Points are used for recruiting Combat Heroes via the Satellite Nexus—a building you unlock around Chapter Five.

This resource is also very important, as you can recruit several rare and elite Combat Units that can carry your team using it. 

To farm Hero Recruitment Points as a beginner, you have to:

  • Complete Your Main & Daily Tasks
  • Participate in Event Missions
  • Visit and donate to your Alliance

Resource #6: Z Coin

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Z Coins are among the hardest resources to farm as you go into the late game, but they’re fairly easy to get early on so remember to spend them wisely.

They are required when conducting research in your Laboratory and when constructing or upgrading certain buildings. To get them, you must:

  • Send out heroes on Rescue Missions
  • Collecting Z Coin Boxes
  • Participating in Events
  • Completing Main & Daily Tasks

Resource #7: Diamonds

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Diamonds are by far the most important resource in the game, but also the hardest one to get a hold of.

With enough Diamonds, you can build, upgrade, research, repair, collect, or even cook instantaneously—making it a very useful resource to have.

Do your best to collect them even as a beginner by:

  • Completing your Main & Daily Tasks
  • Sending heroes out on Dispatch against elite zombies
  • Participating in Event Missions

Most Important Buildings To Upgrade

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Listed below are the most important buildings that you should prioritize upgrading as soon as you start playing the game—ranked according to their usefulness.

Building #1: Control Center

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The Control Center acts as the central hub of all your buildings. If you do not upgrade it, your other buildings will also not be upgraded, so it is arguably the most important building there is.

Upgrading the Control Center also unlocks some features that’ll help you develop your base more and proceed with the story, so don’t forget to do it as often as you can!

Control Center upgrades mainly require Stone, Iron, and Z Coins early on, so try to save up as much of them as you can before upgrading other buildings.

Building #2: Laboratory

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Your Laboratory allows you to research several upgrades that’ll improve your fortress in all aspects—including but not limited to:

  • Resource Production
  • Combat
  • Fortress Defenses
  • Excavations
  • Construction Speed
  • Soldier Training Speed
  • Hero Deployment Limit

As you can see, your Laboratory is a very powerful building. You may not see this at the beginning stages of the game, but with enough upgrades and time, your Laboratory will help turn your base from a noob’s to a pro’s!

Make sure you’re always conducting research whenever possible, as researching upgrades in Last Fortress: Underground takes quite a long time—especially once you get to the higher-tier upgrades.

Building #3: Living Quarters

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Constructing and upgrading your Living Quarters allows you to increase the Resident Cap of your fortress—allowing you to house more survivors.

The more survivors you have in your base, the more people you’ll be able to assign to the coal mines, stone quarries, and iron mines. 

This will then boost your resource production, which is essential for both beginner and veteran players.

TIP: Remember to always assign all of your survivors to mines or quarries. Idle survivors will deplete your food all the same, so it will be better to put them to work whenever you can!

Building #4: All Resource-Production Buildings

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Upgrading buildings that produce resources early on is also recommended—especially if you’re having trouble collecting enough of them through any other means.

Resource-Production Buildings include:

  • Mint 
  • Wheat Farm
  • Power Generator
  • Mushroom Box
  • Gopher Wheel
  • Gopher Trap 

These aren’t the only Resource-Production Buildings in Last Fortress: Underground, but these are the ones you’ll encounter and need to upgrade the most as a beginner.

Three Primary Objectives For Beginners In Last Fortress: Underground

Listed below are the most urgent tasks that you’ll need to do ASAP when you start playing Last Fortress: Underground as a beginner.

Objective #1: Reach Fortress Level 5

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Your Fortress Level determines the maximum level that you can upgrade all the other buildings in your base, such as the Laboratory, the Barracks, the Living Quarters, and so on.

Raising your Fortress Level unlocks several new enhancements and buildings for your base, and it also increases your Fortress CP by extension.

You can raise your Fortress Level by upgrading your Command Center, and raising it to at least Level 5 will unlock most of the features you need to take advantage of as a beginner.

Achieving this feat within one day of playtime is possible, and by that point, you’ll be able to unlock Alliances, Events, Dispatch missions, and more!

Objective #2: Join An Alliance

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Joining an Alliance as soon as you

As a member of an Alliance, you’ll have access to several exclusive in-game features allowing you to farm important resources. 

These exclusive in-game features include:

Alliance Features UnlockedDescription
WarAllows you to either declare war or participate in a war declared by other Alliance members.
PresentAllows you to either send or receive presents to and from your fellow Alliance members.
AssistAllows you to either send or receive assistance to and from your fellow Alliance members. This can be used to shorten the time spent researching any upgrade in your Laboratory. 
Alliance ShopAllows you to buy several items using the Alliance’s currency.
Alliance MissionsAllows you to take on missions that give out lots of rewards upon completion.

Objective #3: Complete Event Missions

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Event missions give away tons of free rewards, and you must take advantage of them as a beginner whenever you can.

By participating in Events, you’ll be able to farm a variety of rewards such as:

  • Speed-Ups
  • Hero Recruitment Points
  • Z Coins
  • EXP
  • Hero Recruitment Tickets
  • Chests
  • Diamonds

There are almost always several Events running concurrently in Last Fortress: Underground, so you’ll have no shortage of Event missions to join in.

Don’t be discouraged even if it’s a leaderboard event where you must compete against players who are stronger than you—the participation rewards are still worth it!

Five Best Tips For Beginners In Last Fortress: Underground

Listed below are five of the best tips that we highly recommend you follow if you want not just to survive, but to also thrive as a beginner in Last Fortress: Underground.

Tip #1: Use Your Full Moons Wisely

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Full Moons can be obtained by completing your Main or Daily missions. You can use Full Moons to speed up the time in your fortress—hastening construction, resource production, research, and training speed.

One Full Moon speeds up the time by 30 minutes, and you can stack this effect by collecting two or more Full Moons.

Before using a Full Moon, we highly recommend constructing buildings, taking on research, and training soldiers first so you can get the most out of it. 

Tip #2: Add Friends & Send Them Friendship Points

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Adding as many friends as possible early on is also highly recommended, as you can collect tons of Friend Points in the long run by doing so.

Friend Points can be used in the Friend Point Recruitment, where you can get additional Combat Heroes and their fragments.

Just remember to fill your Friend List with active players and remove all those who aren’t donating Friend Points back. Charity does not exist in the zombie apocalypse!

Tip #3: Only Pull 10x Via Combat Hero Recruitment 

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Recruiting 10x in any Combat Hero Recruitment banner will cost you way fewer Hero Recruitment Points in the long run.

Recruitment TypeRecruitment Points SpentRecruitment Points Spent Per 100 Recruits
1x100 RP10,000 RP
10x900 RP 9,000 RP

You’re also guaranteed to get either an Elite or Rare hero by using 10x recruits, so there’s really no good reason to use 1x recruits at any stage of the game.

Tip #4: Focus Your Resources On Five Combat Heroes As A Beginner

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If you want to be able to compete with higher-level players and zombies for resources, you’re going to have to strengthen your heroes fast using power-up resources such as:

  • Hero EXP 
  • Hero Memento Coins
  • Hero Shards

To do this, we recommend that you only focus on leveling up five Combat Heroes at most while you’re still a beginner.

You have very limited power-up resources in the early game, which is why it would be best not to spread them too thin.

Tip #5: Complete Your Daily Missions Consistently  

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Once you get into the late game, your Daily Missions will be one of the very few consistent sources of the following items:

Activity Point MilestonesRewards Given
3015-Minute Speed Up
60Intel
1001-Hour Speed Up
15035 Z Coins
200150 Recruitment Points

In addition to all that, you can also get Full Moon fragments by doing Daily Missions individually, as well as some additional Z Coins to make it worth your while!

Conclusion

Last Fortress: Underground stands out from other city-builders and zombie survival horror games by building a unique, multiplayer-centred experience revolving around PVP battles and Alliance co-op.

Considering this, the best advice we can give you is to find a group of active players you can communicate with, as coordinating with others is practically essential if you want to excel in this game.

If you want more games like Last Fortress: Underground, feel free to check out other city-builder games we’ve covered such as Merge Topia-Hotel Tycoon and Empire: Age of Knights.

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