Warframe 1999 Quest Walkthrough: The Hex Quest, Cyte-09 Unlock & Höllvania Survival Guide

I went into Warframe 1999 expecting another 45-minute quest and got slapped with a full-blown content island that took me the better part of a weekend. Digital Extremes really went all-in on this one — new city hub, six fully voiced characters you can actually romance, a motorcycle, and a weirdly addictive 90s arcade mini-game.

If you've finished The Duviri Paradox and are MR8+, you're good to go. The quest triggers from the Codex under "The Hex." One thing I didn't realize until too late: you need a Railjack and Necramech ready. Not for the quest itself, but for some of the post-quest farming nodes. Save yourself the backtrack.

Getting Into Höllvania

The Drifter gets pulled from the far future back to December 31, 1999. The destination: Höllvania, a city-state that's equal parts Eastern European brutalist architecture and neon-soaked 90s aesthetic. It's raining, there's a Techrot infestation turning citizens into Infested monstrosities, and a military force called the Scaldra has declared martial law. Oh, and a cosmic entity called The Indifference is threatening to consume reality. So, y'know, Tuesday.

You land in a subway station — the central hub area — and meet The Hex. These are six Protoframes, part-human part-Warframe soldiers who've been fighting this mess before you showed up. Their leader, Arthur Nightingale, is an Excalibur Protoframe who radiates "I've seen too much" energy. The whole crew has full voice acting and distinct personalities, which is a first for Warframe NPCs. I actually found myself reading the dialogue instead of skipping it.

Finding Albrecht Entrati

The main story objective is tracking down Albrecht Entrati, the Orokin scientist who traveled back to 1999 for reasons that become clearer (and more disturbing) as you go. The quest alternates between solo story missions where you control the Drifter, and combat missions where you fight alongside individual Hex members.

The Drifter sections are mostly narrative with some light stealth. Not my favorite part — the movement feels stripped down compared to full Warframe mobility — but the story beats land hard if you've been following the lore since The Second Dream.

A few missions in, you get thrown into your first proper 1999 combat scenario: a HellScrub mission. This is one of four new mission types. HellScrub is basically Survival with a twist — Techrot enemies spawn in waves and you need to clear out infested "scrubbers" that keep spawning more. Bring a frame with good AoE clear. I used Saryn and the Spores did most of the work while I focused on the scrubber objectives.

The other three new mission types you'll encounter in the quest and post-quest content:

Exterminate missions against Scaldra forces are more dangerous than they look. Scaldra troops use hitscan weapons and hit significantly harder than Grineer at equivalent levels. Don't stand still. I learned that the hard way.

Legacyte Harvest has you collecting data fragments from specific enemies before they despawn. Nekros with Desecrate helps since it can force extra fragment drops, saving you time.

And then there's the Assassination node — the H-09 Efervon Tank. This is where things get serious.

The H-09 Efervon Tank Boss Fight

This is the big set-piece battle. The Scaldra deploy a massive tank that you fight across a multi-stage arena in downtown Höllvania.

Phase one, it rolls around firing artillery shells and spawning Scaldra infantry. Shoot the exposed engine vents on its sides. Radiation damage works best here — I ran a Rubico Prime crit build and was hitting orange crits consistently on the vents.

Phase two, the tank deploys energy shields and starts launching Efervon canisters that leave toxin clouds everywhere. Stay mobile. The toxin procs will eat through shields faster than you'd think. Rolling Guard is absolutely worth its weight in gold for this phase.

Phase three, it goes berserk and the arena starts collapsing around you. The tank charges a massive cannon that'll one-shot you if you don't break its core shield in time. High burst damage is the play — think Tigris Prime or a heavy attack melee build. I got wiped twice here before I swapped to a Corrosive Stropha heavy attack build and melted the core in under 10 seconds.

After the fight, you get the main blueprint for Cyte-09.

Post-Quest: What Actually Unlocks

Once the credits roll, Höllvania opens up as a persistent hub. Here's what you can do:

Chat with The Hex members via KIM, a 90s-style instant messenger built into the hub. Each of the six Protoframes has their own personality, conversation style, and topics they care about. Building Chemistry through KIM conversations and bounties eventually unlocks the Gemini Skins system — letting you switch between your Warframe and its Protoframe form mid-mission. It's cosmetic but also changes voice lines and ability animations.

Take on bounties from individual Hex members to raise Chemistry. Arthur gives combat-focused bounties. Aoi (the Mag Protoframe) leans toward support and defense objectives. Lettie (Trinity Protoframe) has more medical and rescue-themed tasks. Each member's bounty pool aligns with their personality.

Access the Atomicycle garage. You can customize your bike's livery, handle, and performance parts. The Atomicycle handles like a dream compared to the K-Drive — actual weight and momentum. You can summon it in any open-world zone, not just Höllvania.

Start farming Cyte-09 component blueprints from Hex bounties. The neuroptics, chassis, and systems each drop from different Hex members' bounty pools, so you'll need to spread your reputation gains across the syndicate.

Unlock the Technocyte Coda adversary system — the Infested equivalent of Kuva Liches and Sisters of Parvos. You create a Coda by interacting with a Technocyte hive, then hunt it across Höllvania nodes. The weapons they drop have randomized elemental bonuses and some genuinely wild stat rolls.

Budget 3-4 hours for the full questline if you're not rushing. The story scenes are worth watching. And honestly, the KIM messenger conversations with the Hex members are some of the best character writing Digital Extremes has done since The Second Dream.

For farming priority after the quest: get Cyte-09 components first (highest immediate power spike), then work on Hex Chemistry for Gemini Skins, then dive into the Technocyte Coda weapon grind. The Faceoff PvPvE mode also opens up — 8 players, squad vs squad racing to complete objectives — but that's a whole separate guide.