Gears of War E-Day: How to Kill Jammer (Seeder) Enemies

TL;DR – Key Takeaways

• Jammers (called Seeders in older Gears games) fire mortars and jam your radio communications.
• Their body is completely armored — bullets do nothing to the main body.
• The only weak spot is the fleshy head on the opposite end from the mortar cannon.
• To expose the head, run up close — the Jammer will burrow and flip, revealing its head.
• Best weapons for the exposed head: Longshot, Frag Grenades, or Gut Puncher.
• You will likely need multiple passes to kill one — it’s a stamina fight.

Jammers are one of the most frustrating enemies in Gears of War E-Day. They sit half-buried in the ground, rain mortar fire down on your position, jam your comms so you cannot call in support, and when you try to shoot them — nothing happens. No damage, no reaction. Just more mortars landing on your head.

That is because you are shooting the wrong part. Jammers have a very specific trick to them, and once you know it, they go from infuriating to manageable. This guide tells you exactly what to do.

What Is a Jammer in Gears of War E-Day?

Jammers are the E-Day version of the Seeder — a classic Locust enemy from the original Gears trilogy. In older games, you needed the Hammer of Dawn satellite weapon to kill them. In E-Day, the Hammer is not available yet, so The Coalition redesigned them into a proper mini-boss encounter that forces you to think.

They are huge, eight-legged Locust creatures that bury themselves into the ground with their armored rear end facing up. The rear fires mortars into the air like a living artillery cannon. Their presence also jams radio signals, cutting off squad communications during the fight.

In E-Day, Seeders are not just environmental obstacles anymore. Each one is a tactical mini-boss you have to actively engage and kill. They start showing up later in the campaign as the Locust threat grows.

Why Shooting a Jammer Does Nothing

When you first encounter a Jammer, your instinct is to open fire. But every bullet bounces off. That is not a bug — it is by design.

The part of the Jammer that sticks out of the ground while it fires is its armored rear end. This section is completely impervious to bullets, explosives, and all conventional damage. You can empty every magazine you have into it and deal zero damage.

The only vulnerable part is the creature’s head — the soft, fleshy mouth end — which is buried underground while the Jammer is in its firing position. You cannot hit what you cannot see, so you need to force the head to come out.

How to Expose the Jammer’s Weak Spot

This is the core mechanic. To expose the Jammer’s head, you need to close the distance and get right up close to it. Within a few metres, the Jammer will react to your presence, stop firing, and burrow back down — then flip and pop its head up out of the ground to try and snap at you with its jaws.

That moment, right when the head comes up, is your window to deal damage. The head and mouth are now exposed and vulnerable. Open fire immediately.

Here is the step-by-step process:

1. Wait for the mortar barrage to stop — do not charge in while it is actively firing. Sprint and keep moving to avoid getting hit.
2. Run directly toward the Jammer — get within a few metres of its body.
3. The Jammer burrowed and the head pops up — this is your damage window.
4. Blast the exposed head with your best weapon before it goes back down.
5. Back off — it will fire another mortar barrage. Avoid the barrage, then repeat.

The key thing to accept is that you probably will not kill a Jammer in one pass. It takes multiple head exposures and multiple damage windows to bring one down. Think of it as a slow back-and-forth rhythm rather than a single big burst.

Best Weapons to Use Against a Jammers Weak Spot

Best Weapons to Use Against a Jammer’s Weak Spot

Once the head is exposed, you want to squeeze out as much damage as possible in a short window. These are the weapons that work best:

Longshot Sniper Rifle

The Longshot is the ideal choice. It is a high-calibre sniper rifle built for precise, high-damage single shots at range. A well-placed Longshot shot to the Jammer’s exposed head deals serious damage and gives you a bit of distance to work with so you do not have to stand right next to the creature while firing. If you have the Longshot equipped, make sure it is loaded and ready before you trigger the head exposure.

Gut Puncher

The Gut Puncher is E-Day’s timed-detonation grenade launcher. It fires a heavy explosive round and hits hard when it connects with the exposed head. You do not need pinpoint precision the way you do with the Longshot — just aim for the head area and let the explosion do the work. It is a solid pick if you are having trouble landing Longshot shots quickly enough before the window closes.

Frag Grenades

Frag Grenades work well too. Cook one and throw it at the exposed head right when it pops up. The blast radius means you do not need perfect aim, and the burst damage can add up fast across multiple passes. Just make sure you have enough grenades — a Jammer encounter can go on for several rounds.

What to Avoid

Avoid relying on automatic weapons like the Lancer or Gnasher for the damage windows. The head exposure is brief. You want high damage per shot, not sustained fire. A close-range Gnasher blast to the head will do something, but precision or explosive weapons are far more efficient for this fight.

How to Survive the Mortar Barrage

The mortar fire between head exposures is the main thing that will kill you. The rounds come down in clusters and hit hard, especially on higher difficulties. Two things help most:

• Keep moving. Mortars track your position, so staying still is a death sentence. Sprint around the arena and do not stop moving during the barrage.
• Use cover smartly. Cover can absorb a mortar hit, but the blasts are wide enough that staying behind a single piece of cover for too long just means eating the next round. Move between cover points while the barrage is active.

Once the mortar barrage ends, that is your cue to close the gap again and trigger the next head exposure. Get into that rhythm and the fight becomes much more manageable.

Jammer vs. Seeder — What’s the Difference?

In terms of lore, they are the same creature. The Seeder name is used in the original Gears of War trilogy. In E-Day, the game generally calls them Jammers — a name that refers to their radio-jamming ability. Both names are used in the community and in the game itself, so do not let that confuse you.

What has changed is how they are fought. In the original Gears of War, Seeders could only be killed using the Hammer of Dawn satellite weapon, and they were mostly obstacles between you and the next area. In E-Day, The Coalition redesigned them from scratch as proper mini-boss encounters that require active strategy — get close, expose the head, deal damage, survive the counter-attack.

If you want to know more about all the enemy and gameplay changes in E-Day, our Gears of War E-Day biggest changes guide breaks them all down.

Tips for Fighting Jammers on Higher Difficulties

• Stock up before the fight. Jammer encounters are often telegraphed by a large open area. If you see a Supply Cache nearby, hit it and make sure your Longshot or Gut Puncher is loaded and has spare ammo.
• Do not panic-rush. Running in before the mortar barrage ends is how you die. Wait for the pause, then sprint in.
• Mod your weapons first. If you have unlocked mod slots for your Longshot (from Hard Cases in Act 2 and beyond), equip anything that improves precision or damage before taking on a Jammer encounter.
• In co-op, split the roles. One player can be the distraction up close while a partner with the Longshot lines up shots on the exposed head from a safe angle. This makes the damage window much easier to exploit.
• Be patient. This is a war of attrition. A Jammer fight will take several passes. That is normal. Do not rush the timing and waste your shot window.

For more on unlocking the mods that help in tough fights like these, check out our Gears of War E-Day weapon mod slots guide.

Where to Play Gears of War E-Day

• Official Gears of War Website
• Xbox Store – Gears of War E-Day
• Steam – Gears of War E-Day

Frequently Asked Questions