ARC Raiders Riven Tides Guide: Keycards, Puzzle and Loot

ARC Raiders Riven Tides is the coastal map Embark added in patch 1.26.0, a twice-abandoned harbor resort on the western edge of the Rust Belt. It is the sixth playable map, and the community wiki says it unlocks after 20 raids. What sets it apart is how much of it sits behind something: suite doors that need keycards, a dockyard puzzle that needs a battery and two people, and buried loot that needs a detector.

Updated 2026-10-16: the named Turbine landing spots came from a source we no longer cite, so they are gone; the Turbine section now uses Embark's own Xbox Wire guide and ARC Intel. The October 15 rebuild stands: Embark's announcement and patch notes, the ARC Raiders wiki and Reddit threads. The old version said a "Shockwave" ability clears the coastal mist; no patch note or guide describes such a mechanic, so that section is gone, as are the hotel loot, night raid and extraction claims we could not source.

TL;DR: Riven Tides runs from the Panorama Azzurro hotel to the Exodus port dockyard. Hotel suites open with numbered keycards. The Stacking Yard has a two-step puzzle that opens two loot rooms and then a building outside. On Beachcombing raids, a Dockmaster's Detector digs up buried loot on the north beaches. The ARC Turbine drops in late and likes to perch high. Room 404 is still unproven.

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ARC Raiders Riven Tides: the map at a glance

Embark's announcement describes a deserted shoreline that was abandoned twice: once during the Exodus, and again by First Wave survivors who could not hold it against ARC. You "traverse the Exodus port" and "experience the lost luxury of the Panorama Azzurro hotel", in Embark's words, with a towering dockyard at the other end.

Panorama Azzurro and the suite keycards

The hotel is the landmark on the cliff, and its suites are the reason to go inside. The wiki lists six Riven Tides Hotel Keycards so far, No. 102, 107, 113, 205, 208 and 311, each described in game as opening "one of Panorama Azzurro's many suites". They are Common keys that come from scavenging, and some also come from quests. No. 107 is a reward for the Battening Down quest.

If you are tempted to sell them, check first which suite each one opens and whether a quest wants it.

Room 404

Room 404 is the map's running joke. In May a player asked on Reddit whether anyone had ever made it into hotel room 404, adding "Rumors that it's a prank". The top reply was "I have not seen any proof this key exists", followed by a thread of 404 "not found" jokes.

The wiki now has a stub page for a Hotel Keycard No. 404, but its source is listed as "Unknown" and it has no description, weight or sell price. Until someone posts the key or the room on video, assume it does not open.

Image: Embark Studios, Riven Tides announcement (arcraiders.com)

The Stacking Yard puzzle

The Stacking Yard holds the map's best-documented secret. The wiki lays it out in two steps.

1. First loot room. Find and press four hidden buttons around the Stacking Yard. When all four are down, a locked room on the right platform opens.
2. Second loot room. Find a battery and repair the lift. The wiki lists one or two Batteries and one or two Wires for the repair. Then split up: one raider holds the lift's "Move Up" button while another picks up the battery at the top and carries it back to the first room. Slot it in and a building outside opens with higher-value loot.

The second step needs two people at once, so it is a squad job. Solo, you can still open the first room.

Beachcombing and the Dockmaster's Detector

Beachcombing is a minor map condition that only runs on Riven Tides. Embark's pitch is simple: sweep a Dockmaster's Detector across the sand to find loot buried beneath it, and "the richest hunting grounds are out in the open". The wiki narrows that to the north side of the map.

What comes up varies. The wiki lists weapon cases, suitcases with basic materials and ship models, fruit and fertilizer. It also lists less welcome finds: ARC Ticks and landmines. To defuse a landmine, stay still and hold interact. Step away and it goes off.

The Detector itself is a Common gadget added in 1.26.0, and you can get one by finishing the Avian Alarm Raider Project. That project has you deploy bird cages at buoys along the Riven Tides coastline across five stages, and the Detector is one of its rewards.

Image: Embark Studios, Riven Tides announcement (arcraiders.com)

The ARC Turbine on Riven Tides

The ARC Turbine is the flying ARC that arrived with this map. Embark senior game designer David Spinnier wrote on Xbox Wire that it "actively tries to find landing spots far away from any threat" and is often seen perched on rooftops and towers, so look up rather than along the beach. ARC Intel puts the drop between 16 and 13 minutes left, and it does not come every raid. When it lands, it lays mines and exposes spinning yellow canisters, and that is the moment to shoot. Our Turbine guide covers the fight.

Loot after Frozen Trail

Frozen Trail 2.0 made the map more worth the trip. Embark's notes say it "increased overall loot value on Riven Tides by approximately 15%", alongside a fix for objects floating where they should not.

GODEEPER: For what to do with materials once you extract them, the loot guide covers which components to keep, scrap, or sell based on crafting priority. ARC Raiders Loot Guide: What to Keep, Sell, or Scrap →

Riven Tides patch history

Riven Tides arrived with patch 1.26.0, dated April 28, 2026 on Embark's patch notes. Besides the map it added the ARC Turbine, the Beachcombing map condition (buried loot on the beaches, found with the Dockmaster's Detector) and four new items: the Powered Descender, the Crash Mat, the White Flag and the Dockmaster's Detector itself. The launch also ran the Last Resort event until May 25, which paid Merits for finding miniature ship models around the world.

Patch 1.27.0 followed on May 5 as a fix-up with no balance changes. Embark said it was "already exploring balancing adjustments" but kept them out of this patch. The changes that matter on this map:

• Turbine attacks are now visible from far away, and the proximity mines it drops are easier to see.
• The Field Depot POI now counts for the "Off the Radar" quest, so redo that stop if the quest didn't tick before.
• A spot where players could fall through the floor on Riven Tides is closed.

Frozen Trail 2.0 on October 8 added the loot value increase covered above.

Our take

Riven Tides rewards preparation more than any map before it. A raid with the right keycard, a Detector on a Beachcombing day, or a squad that knows the Stacking Yard steps comes home with more than one that just loots the hotel lobby. Bring one of those three plans every time you drop in, and skip the room 404 hunt until someone shows the door open.

Related Reading

• ARC Raiders Maps Guide: Overview of all current zones, difficulty ratings, and terrain types across the full map roster.
• ARC Raiders Extractions Guide: Cargo, hatch, and elevated platform extract mechanics explained.
• ARC Raiders Loot Guide: What to Keep, Sell, or Scrap: Material priority guide for post-extraction decisions.
• ARC Raiders Turbine Guide: How to Kill the Aerial ARC: when it spawns, why you never shoot it in the air, and the yellow canisters it shows on landing.
• ARC Raiders Frozen Trail: Everything in the 2.0 Update: what the October 8 update added and changed, including the Riven Tides loot increase.
• ARC Raiders Stella Montis Guide: Loot, Blueprints, PvP: the map before Riven Tides in the Codex order.
• ARC Raiders Enemy Types Guide: ARC Units Ranked by Threat: where the Turbine sits among every ARC machine.
• ARC Raiders Dam Guide: Loot, Patrols & Extractions: ARC Raiders Dam guide: Alcantara Power Plant loot, patrol routes, close-quarters tips, and which extractions to use in....

References

• Riven Tides update: Reclaim the coast: Embark Studios announcement
• Riven Tides Patch Notes 1.26.0, Patch Notes 1.27.0 and Frozen Trail 2.0: Embark Studios
• Riven Tides, Beachcombing and Hotel Keycard No. 404: ARC Raiders Wiki
• Your Guide to the Arc Turbine in Riven Tides: Xbox Wire, by Embark Studios
• ARC Raiders Turbine Guide: ARC Intel
• Riven Tides hotel room 404: r/ArcRaiders
• ARC Raiders on Steam

Frequently Asked Questions

How do you unlock Riven Tides? Complete 20 raids, per the community wiki. It is the sixth playable map, added in 1.26.0.

What is in hotel room 404? Nothing anyone has shown. The wiki's No. 404 keycard page lists its source as unknown.

What do the hotel keycards open? Suites at the Panorama Azzurro. The wiki lists No. 102, 107, 113, 205, 208 and 311.

How does the Stacking Yard puzzle work? Press four hidden buttons to open the first room, then repair the lift, bring the battery up and back with a second raider, and slot it in to open a building outside.

How does Beachcombing work? On Beachcombing raids, sweep a Dockmaster's Detector over the north beaches to dig up loot. Watch for Ticks and landmines.

Where does the Turbine spawn on Riven Tides? High up on rooftops and towers, late in the raid (16 to 13 minutes left), and not every time.