Last War Zombie Siege Guide: Waves, Strategy & Rewards

So, your alliance just got the notification—Zombie Siege is coming. The mechanics are simple enough. Zombies attack. You defend. But 20 waves? With escalating difficulty, reinforcement timing, and the constant threat of your weakest members burning out? That’s where the real challenge kicks in. And that’s where most alliances leave serious rewards on the table.

This guide covers everything you need to know—how the waves work, which heroes actually matter, the exact strategies top alliances use to clear all 20 waves, and how to make sure your leadership game is on point. Let’s get into it.

What Is Zombie Siege?

Zombie Siege is a recurring PvE alliance event where waves of undead attack every eligible member’s base. Think of it as a collective survival test. Your alliance starts at a chosen difficulty level and works through 20 waves, each lasting 30 seconds, with a short breather between them .

Here’s what you absolutely need to know before the first zombie knocks on your gates:

• Zombies get stronger as waves go on– Wave 1 is a warm-up. Wave 15? That’s where things get spicy. The types, numbers, and HP all ramp up .
• If your base burns, you’re out– Once your base takes enough damage and catches fire, you’re eliminated from that round. You won’t be attacked again, but you also stop contributing to the alliance’s wave count .
• Rewards are tied to your alliance’s total waves cleared– Your personal survival matters, sure. But keeping the whole alliance alive through the later waves is what unlocks the good stuff .
• Unlocking harder difficulties requires Radar Clues– You earn these from Radar missions between siege cycles. No clues? You’re stuck at lower tiers with lower rewards .

Bottom line: This isn’t a solo endurance test. It’s an alliance coordination problem. And how well your leadership handles it directly determines how much loot everyone walks away with.

Wave Breakdown: What Actually Happens Across 20 Waves

Understanding the wave structure is the difference between proactive reinforcements and panic-clicking when you see a base already on fire.

Here’s how the 20 waves typically play out:

Waves 1–5: The Warm-Up

Standard zombies. Manageable pressure. Most bases can handle these without breaking a sweat.This is NOT where you spend reinforcement resources.Let your members handle their own defense here. If someone burns in wave 3, they probably forgot to set their defense squads—and that’s a leadership problem we’ll cover later .

Waves 6–10: The Pressure Builds

Zombie density increases. Stronger variants start showing up. Weaker bases will begin showing signs of stress—you’ll see damage numbers climbing faster. This is your early warning window.Watch for members taking significant damage and pre-position reinforcements before Wave 10 hits.

Waves 11–15: The Danger Zone

This is where the real event begins. Mixed zombie formations with elevated HP and damage output. Under-invested bases typically start burning here.Reinforcements deployed in this window have the highest return per troop committed.Keeping a struggling member alive through Wave 15 is worth far more than topping off someone who’s already cruising .

Waves 16–20: The Gauntlet

Maximum zombie pressure. Only well-prepared bases with reinforcement support survive consistently.Pacing your strongest squads to be available here—not wasted in waves 1–8—is the defining strategic discipline of high-level Zombie Siege.

The cooldown between waves? That’s your decision window. Use it. Don’t just stare at the countdown.

Zombie HP and damage are punishing in the final wave bracket.Only alliances with a majority of well-invested accounts and active R5 coordination consistently clear all 20 waves.

Pro tip: If a level feels too hard, repeat the previous one until your alliance has better hero investment and troop depth. Collect those Radar Clues in the meantime to stay on track for progression .

Pre-Event Checklist: What Needs to Be Done Before Wave 1

The gap between an alliance that clears 18 waves and one that clears 12 is almost entirely pre-event preparation. Here’s what needs to be locked in:

✅ Defense Squads Assigned

Every member must have at least one defense squad set before the event opens. A base with no defense squad is eliminated in wave 1—regardless of account strength.As R5, mandate this.Pin a reminder in alliance chat the day before. Verify compliance. Don’t assume .

✅ Troop Count Sufficient

Members need enough trained troops to fill their defense squads AND support at least one reinforcement send. Troop shortfall is the most common reason alliances stall in mid-waves .

✅ Base Defenses Upgraded

Turrets, wall durability, and traps absorb zombie damage before it reaches your squads. Players who haven’t upgraded defenses will burn faster regardless of hero quality. Wall upgrades matter .

✅ Research Active

Base Defense, Troop Resistance, and Hero Power research trees all contribute directly to survivability. Neglected research = underperformance relative to hero roster .

✅ Radar Clues Collected

To unlock higher difficulty levels, clues must be collected via Radar missions during the cooldown window between cycles. Missing clue collection gates your alliance at lower tiers with lower reward ceilings .

✅ Reinforcement Assignments Pre-Planned

Don’t decide who reinforces who during the event. Identify your 5–10 most vulnerable members in advance and assign stronger players to cover them. Pre-planning turns reactive reinforcement (too late) into proactive defense (effective) .

 

Best Heroes & Troop Setup for Zombie Siege

Zombie Siege rewardsAoE damage outputandfrontline durabilityover precision or burst damage. Your heroes need to perform across 30 consecutive seconds of sustained pressure—not single engagements .

Hero Priorities

Role	Best Picks	Why
AoE Damage Dealers	Kimberly, Tesla	Clear multiple zombies per ability. Kimberly is widely considered the strongest attacker in the game, especially with her exclusive weapon at Lv.30
Frontline Tanks	Williams, Murphy	Absorb damage and keep your damage dealers alive. Williams is the standard anchor; Murphy is a solid early-game option
Defensive Buffers	Marshall, Lucius	Team-wide defense or HP bonuses extend survivability without requiring extra troop investment

Quick hero ranking context: In the current meta, Kimberly (Tank/Attacker)is the undisputed #1 damage dealer. Williams (Tank)is the best tank with his defensive buffs covering the whole team. For counters to tank-heavy lineups, DVA (Aircraft) is extremely strong with her instant battle skill activation .

Troop Composition

Balance across all three types. Infantry holds the line. Missile Vehicles handle long-range pressure. Aircraft contribute mobility and precision damage. Don’t stack a single troop type—zombie waves exploit unbalanced formations .

 

5 Essential Strategies for Alliance Leaders

These five tips determine whether your alliance clears 20 waves or stalls at 14.

1. Pre-Assign Reinforcements—Don’t React

Reactive reinforcement is late reinforcement. By the time you’re watching a member burn in Wave 13, your window to save them has often already closed. Identify vulnerable bases before the event opens, assign stronger players to cover them, and execute the plan rather than improvising it .

Communication from R5 before the event starts is the highest-leverage thing you can do.

2. Every Member Needs a Defense Lineup—Mandate It

A base with no defense squad set is eliminated in Wave 1. Your job is to ensure100% of membershave a defense lineup assigned before the event clock starts. One unprepared base burns early and drops your alliance’s collective wave count .

Pin a reminder. Verify compliance. Don’t assume.

3. Use Wave Gaps as Decision Windows

The break between each wave is your adjustment window. Check which members are under pressure, who has taken significant damage, who is next in line.This is when to send reinforcements—not mid-wave when it’s too late to matter .

Alliances that actively use the gaps outperform alliances that treat them as passive waiting time.

4. Pace Your Strongest Assets for Waves 15–20

Spending your top squads and reinforcements in waves 1–8 is one of the most common mistakes new alliance leaders make. The hardest zombies arrive in the final waves. If your critical reinforcement capacity is already spent, you cannot recover .

Early waves = self-defense. Waves 15–20 = where reinforcement investment pays the most.

5. Optimize for Group Survival, Not Personal Score

Zombie Siege rewards are tied to alliance-wide wave completion, not individual performance.Keeping three mid-strength members alive through Wave 17 is worth more than one strong member surviving through Wave 20 alone.

Alliance leaders who understand this shift resource allocation away from already-strong bases and toward maintaining collective survival depth. That’s how you win consistently.

 

Zombie Siege Rewards

Alliance-Wide Rewards

Based on the total waves your alliance withstands. Higher difficulty = better rewards. You’re looking at:

• Diamonds
• Hero EXP
• Drone Parts
• Resources (Food, Iron, Oil)
• Zombie Tokens– special event currency

Individual Rewards

Based on how many waves your base personally withstands. Once your base is breached, you won’t receive more attacks—so that personal reward track stops .

Zombie Token Shop

Save up those tokens for:

• Limited-time skins (some with stat bonuses)
• Special equipment
• Enhancement materials
• Exclusive event items

All rewards are delivered via in-game mail after the event ends.

 

Final Thoughts

Zombie Siege isn’t about being the strongest player on the server. It’s about being the alliance that actually prepares, communicates, and executes together.

Follow these strategies, and your alliance won’t just survive Zombie Siege—you’ll dominate it. And those rewards? They’ll be waiting in your mailbox.

Now go set those defense squads. Wave 1 is closer than you think.

Happy defending, Commander.