Planned Release Date: June 2026

About This Demo

NOTE: FIRST 5 WAVES ARE PLAYABLE ON THE DEMO.

The outbreak swept the world in days. Cities burned. Governments fell.

Now, in the ruins of an abandoned research facility, a single power  core hums in the dark — broadcasting a rescue signal that's keeping you alive.

If it falls, the perimeter fails. The horde floods in. And your signal goes silent.

Welcome to Hold The Line — a brutal co-op zombie survival FPS where 1–4 players defend the facility's power core against escalating waves of the undead. Every wave, the horde grows. Every wave, you grow stronger. Hold long enough, and rescue might just come.

🩸 PROTECT THE CORE

The reactor at the heart of the facility powers everything — your lights, your defenses, and the signal calling for help. If it dies, you die. Reinforce its barricades, repair the damage, and upgrade its hull to survive longer.

🧟 SURVIVE THE HORDE

Face relentless waves of the undead. Shamblers test your defenses. Sprinting runners flank your position. Massive tanks tear through barricades like paper. The longer you survive, the deadlier they get.

🛠 BUILD & UPGRADE

Earn currency from every kill. Spend it at the workbench between  waves: upgrade the core's health, buy better weapons, restock  ammunition, or unlock powerful perks that match your playstyle.

🤝 4-PLAYER ONLINE CO-OP

Team up with friends via Steam. Share kills, revive downed teammates, and coordinate your defense — because the horde doesn't care if you're alone or together. They just keep coming.

⚔️ BRUTAL ARSENAL

From baseball bats to assault rifles, from fragmentation grenades to fire axes — wield a deadly arsenal built for one purpose: survival.  Every shot counts. Every reload matters.

🏚 THE ABANDONED FACILITY

Explore a decaying industrial complex filled with secrets, supply  caches, and lurking horrors. Find new weapons, ammo crates, and hidden  perks scattered across the wreckage of civilization.

⏳ HOW LONG CAN YOU HOLD?

Every run pushes you further. Every wave teaches you something new. Your progress saves between sessions — build the ultimate loadout, unlock every perk, and climb the leaderboards.

The dead don't sleep. The dead don't tire. The dead don't stop.

Can you?

HOLD THE LINE.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Some store/library marketing art was created with the assistance of AI image generation tools, followed by manual editing. All in-game assets are not AI-generated. We have rights to use the generated images and they do not infringe third-party IP.

Mature Content Description

The developers describe the content like this:

Hold The Line contains frequent and intense violence directed at
undead enemies in a post-apocalyptic horror setting. The game features:
• Realistic firearm combat with blood splatter and visible damage effects
• Graphic depictions of zombie violence, including headshots,
dismemberment, and ragdoll physics
• Melee combat with bladed weapons (fire axes, baseball bats)
• Explosive weapons (grenades) causing destructive visual effects
• Dark, atmospheric horror environments with unsettling sound design
• Recurring themes of survival, death, and the collapse of civilization
The game does not contain sexual content, nudity, real-world drug or
alcohol references, depictions of self-harm, or discriminatory content.
All violence is directed at fictional undead enemies.