Last War Tech Tree Research Guide: Which Tech Should I Prioritize?

So you’ve just built your Tech Center, you’re staring at all those shiny research nodes, and you have exactly one question: “What do I click first?”

Here’s the thing about research in Last War: Survival: it’s one of the few systems in the game that’s completely irreversible. Every node you unlock stays unlocked. Every day you spend researching the wrong thing is a day of lost compounding you can’t get back. And with a badge economy that punishes poor planning, getting your tech priority right isn’t just smart—it’s survival.

This guide breaks down exactly what to research first, what to save for later, and how to avoid the traps that leave mid-game players wondering why their power doesn’t match their HQ level.

Why Research Priority Actually Matters

Before we dive into the trees, let’s get one thing straight: not all research is created equal.

Some techs give you massive, immediate value—faster building, cheaper upgrades, passive resource income that runs 24/7. Others look good on paper but eat your precious Valor Badges for returns you’ll barely notice until late game.

The golden rule that top players live by? Max your badge-free techs first. Here’s why:

• They give huge early boosts (10-30% build and research speed)
• They cost only common resources—no badges required
• They complete quickly, letting you snowball progress

Save those blue hexagon medals for when they really count. Trust me, you’ll thank yourself later when you’re staring down the Special Forces tree.

 

Priority 1: Development + Economy

If you take nothing else from this guide, remember this: start with Development and Economy.These two trees are the bedrock of everything else you’ll ever do in Last War.

Development Tree: Pure Speed

The Development tree is all about one thing: making everything else faster.

• Construction Speed– Reduces building timers permanently. This compounds across every upgrade you’ll ever do.
• Research Speed– Makes every future research node finish faster.
• Fast Builder & Research Enhancement– These are your best friends. Push them early.
• Extra Barracks– Unlocks around HQ 20-25 and gives you a second troop training queue. Huge for events.

Economy Tree: Passive Income That Runs 24/7

While you’re sleeping, your economy is working. Make it work harder.

• Extra Farmland, Mine, and Refinery– Unlock these first. They give you more building slots for resource production.
• Food, Metal, and Coin Production– Circle back and fill these percentage bonuses after unlocking the extra buildings.

Pro tip: If you have the Second Tech Center (more on that in a sec), dedicate one queue to running Development and Economy on rotation. These finish quickly, cost no badges, and deliver the speed bonuses that make everything else faster.

 

Priority 2: Garage 1 (Before You Touch Garages 2 or 3)

The Garage tech tree is one of the most misunderstood systems in Last War, and it’s dangerously easy to waste resources here.

Each garage powers a separate combat team. Here’s the cost structure you need to understand:

Garage	Cost Profile	When to Focus
Garage 1	Cheapest, best value	Max it first
Garage 2	Noticeably more expensive	After Garage 1 and 4
Garage 3	Most expensive of all	Late game only
Garage 4	Spender unlock, actually cheaper than 2 or 3	After Garage 1

The optimal sequence: Max Garage 1 → Build Garage 4 → Circle back to Garages 2 and 3.

This keeps your strongest teams progressing at manageable cost instead of spreading resources thin across all four trees simultaneously.

Priority 3: Alliance Duel Tree (Unlock Immediately)

Once this tree opens up, two nodes jump straight to the top of your priority list regardless of what else is active:

• Advanced Rewards– Unlocks Tier 2 reward boxes (chests 4-6)
• Super Bonus– Opens Tier 3 boxes (chests 7-9) with top-tier badges, consumables, and speed-ups

These bonuses activate every single duel week.The sooner you finish these nodes, the sooner you start compounding rewards. Players who delay these unlocks are literally leaving badges and speed-ups on the table every week .

Here’s where smart players separate themselves from the pack:

• Time your badge research completions to Day 3 of Alliance Duel (Age of Science / Bednest Day)– finishing high-cost nodes during the ranking window earns event points and badge rewards simultaneously
• Don’t start expensive nodes mid-week with no event scheduled– hold the timer, start it so it completes during the duel window
• Stack radar missions the day before– complete them on Radar Training Day for maximum points

This isn’t just min-maxing—it’s how you make every badge do double duty.

 

Priority 4: Special Forces (The T10 Gate)

If the Alliance Duel tree is about compounding rewards, the Special Forces tree is aboutpure power.This is the research path that unlocks T10 troops (Unit X), and it’s one of the most expensive yet highest-return investments in the entire game .

You don’t need to max the entire tree to get T10s. To unlock Unit X, you only need to max these four final nodes:

• Advanced Protection
• HP Boost III
• Attack Boost III
• Defense Boost III

Everything above them helps, but these four are the actual gatekeepers. Focus your badges and speed-ups there. Padding unnecessary upper nodes burns resources that should be going toward the unlock .

The Real Cost: The final research alone costs over 500 million coins.But here’s the thing—unlocking T10 troops changes everything. Their stat jumps in attack, defense, and survivability make every march stronger, and they become the foundation of any endgame lineup .

Before You Start Special Forces, make sure you have these prerequisites:

• HQ Level 30– Non-negotiable. You can’t unlock T10 without it
• Tech Center Level 30– The final research nodes won’t even unlock if your Tech Center is level 29
• Barracks Level 30– For whichever troop type you’re focusing (most players start with Tanks)

 

The Two-Queue Strategy (If You Have the Second Tech Center)

If you’ve unlocked the Second Tech Center (unlocked after clearing District 102, ~$10), the competitive advantage comes from how you split the queues—not just from keeping both busy .

Queue	Research Type	Examples	Strategy
Queue 1	Fast, badge-free rotation	Development, Economy, Garage 1	Runs continuously. Never idle.
Queue 2	Badge trees, event-timed	Alliance Duel nodes, Special Forces	Start high-cost nodes to complete during Day 3 of Alliance Duel

Running both queues with no strategy is just burning faster. Both queues with event-aligned timing is how serious accounts compound their research investment correctly .

 

What About the Other Trees?

Units Tree: Boosts troop attack, defense, and load.Low priority until T10 is unlocked.Use it as filler between badge-heavy event cycles .

Hero Tree: Focus on Hero EXP early—faster hero progression is huge. Push nodes to Level 3 for balanced buffs, but avoid going beyond Level 3 early. Costs spike past 240 million gold and 2+ weeks build time .

Defense Fortifications: Unlock the first node only.It adds an extra hospital (+1,800–2,000 troop recovery capacity)—useful for PvP events. The rest of the tree can wait .

Intercity Truck: Skip it.Requires badges but gives only minor improvements to truck rewards. Most experienced players don’t touch this until T10 is unlocked and badges are less scarce .

Age of Oil: Unlocks after early progress in Special Forces.Prioritize this immediately when available—it’s cheap, quick, and gives massive overall progression benefits (construction speedups, research speedups, training speedups, cost reductions, hospital expansions) .

 

The Badge Economy: Spend Wisely

Valor Badges are the blue hexagonal medals that become your biggest bottleneck for Special Forces research . Here’s how to manage them:

Where to Get Badges

• Alliance Duel chests– This is your main source. Hit the 9th chest every day if possible
• Arms Race rewards– Available in chests during the Tech Research theme
• Event rewards– Major events often have badges in exchange shops or ranking rewards

The Golden Rule: Never spend Valor Badges on Intercity Truck or Hero trees before unlocking T10.Those are luxury upgrades. Special Forces is a necessity .

 

Common Mistakes That Kill Progress

Mistake 1: Spreading Too Thin

Researching Level 1 of everything instead of completing branches before starting new ones. This delays meaningful power gains by months .

Mistake 2: Ignoring Economic Research

Only combat research early game leads to resource shortages that slow everything. Production research in first month is non-negotiable.

Mistake 3: Wrong Unit Focus

Researching all unit types equally instead of specializing. Pick one type (Tanks are best for beginners) and focus your research there .

Mistake 4: Poor Timing

Starting long research when you’re about to go offline. Always time for maximum alliance help and event windows .

Mistake 5: No Long-Term Plan

Researching randomly based on immediate needs instead of having a 3-6 month roadmap. This is how you end up at HQ 25 with T7 troops and no path forward.

 

Final Thoughts

Here’s the truth about Last War research: the players who progress fastest aren’t the ones spending the most—they’re the ones with a plan.

The T10 grind takes time. Sometimes months . But once you unlock them, the difference is instant. Your power jumps. Your marches hit harder. And suddenly, all those weeks of careful research planning pay off.

Now get that queue running. Those T10s aren’t going to unlock themselves.