Doom Eternal is packed with secrets and brutal combat challenges. Among the most rewarding of these are the Slayer Gates—optional arenas that test your combat skills. Complete all of them to unlock the Unmaykr, a devastating energy weapon. This guide will walk you through finding all Slayer Keys, Slayer Gates, and unlocking the Unmaykr.

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🔑 What Are Slayer Keys and Slayer Gates?

Slayer Gates are intense, optional combat encounters hidden in specific missions. To access a Slayer Gate, you need to first find the corresponding Slayer Key, which is usually located nearby.

• Total Gates: 6
• Reward for Completing All: The Unmaykr, a high-powered energy weapon

⚠️ Note: Slayer Gates can only be accessed on standard difficulty or higher—not on “Ultra Nightmare” permadeath runs.

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📍 All Slayer Gate and Key Locations

1. Exultia

• Slayer Key: After the second major combat encounter, look for a side path in a cave area.
• Gate Location: Just past the key, in a nearby chamber.

2. Cultist Base

• Slayer Key: After obtaining the Super Shotgun, explore the upper levels of the ice-covered arena.
• Gate Location: Located near the exit of the mission—don’t miss it!

3. Super Gore Nest

• Slayer Key: Found in a fleshy, red cave after a large-scale demon fight.
• Gate Location: Near a wall-climbing section just after collecting the key.

4. Arc Complex

• Slayer Key: Inside a ruined office building beyond a large courtyard of enemies.
• Gate Location: On the rooftop—platforming required to reach it.

5. Mars Core

• Slayer Key: Near a gravity lift that launches you to an open-air zone.
• Gate Location: Located beyond the lift, hidden in a side corridor.

6. Taras Nabad

• Slayer Key: Found in a large cathedral zone—requires precise platforming.
• Gate Location: Near the main cathedral gate, on an elevated platform.

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🔓 How to Unlock the Unmaykr

Once you’ve completed all six Slayer Gates, return to the Fortress of Doom:

1. Go to the Unmaykr Vault—located near the BFG weapon room.
2. Interact with the terminal; if you’ve cleared all gates, the Unmaykr becomes available.

🎉 Tip: You don’t need to complete all Slayer Gates in one run. As long as each gate has been completed once, you’re good.

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🔫 Unmaykr Weapon Overview

The Unmaykr is a high-speed, energy-based weapon introduced in Doom 64 and modernized for Doom Eternal. Here’s how it performs:

• Fires: Triple energy blasts per shot
• Ammo Type: Consumes BFG ammo
• Use Case: Excellent for melting dense groups of enemies with sustained fire
• Drawback: Rapidly drains rare BFG ammo—use it sparingly and strategically

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✅ Final Tips

• Save BFG Ammo for key encounters where the Unmaykr’s burst damage shines.
• Complete Slayer Gates as soon as possible—the rewards (Weapon Points, Sentinel Batteries) help power up Doomguy significantly.
• Practice Platforming: Many Slayer Gates are hidden behind tricky jumps—get comfortable with dash-jumping mechanics.

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Happy demon-slaying, Slayer. Rip and tear! 🔥💀