S.O.N.A.R. Treasure Recovery: Sonar-Led Salvage

Treasure recovery in S.O.N.A.R. - Submarine Operators Not Actually Ready is one of the mission types inside the co-op campaign, not a separate mode you unlock on its own. The developer's description on the official Steam page frames it as hunting the ocean floor with sonar for "lost riches, forgotten artifacts, and evidence of previous crews' poor decisions," and a later release-date announcement describes the same activity as "high risk salvage operations." In practice that means a treasure run is a sonar-led search flown by a crew, with the usual submarine problems still running in the background.

Where treasure hunting sits among the missions

The Steam page groups underwater work into four flavours: sinking hostile vessels, protecting cargo ships, hunting treasure, and slipping past enemy destroyers. Treasure recovery is the exploration-and-salvage one — the objective is finding something on the seabed rather than winning a fight or staying undetected.

The same page lists the game's modes as Campaign, Team Deathmatch 4v4, Survival Mode and Tutorial training. Treasure hunting is described as part of the mission set, so the supported reading is that it appears within campaign missions rather than as a standalone "treasure mode."

What the crew actually does on a salvage run

S.O.N.A.R. is built around up to four crew members managing nine critical stations — navigation, diving, sonar, periscope operations, engineering and damage control among them — in first person, with proximity voice chat as the coordination tool. The developer's own summary is that the sonar operator tracks contacts while everyone else keeps the submarine alive.

For a treasure mission that division of labour is the practical core:

• Sonar is the search instrument. The store page explicitly ties treasure hunting to sonar sweeps of the ocean floor, so the operator is the person driving the search rather than just watching for enemies.
• Navigation and diving keep the boat on the search pattern and at a workable depth while the sweep continues.
• Engineering and damage control matter because the page stresses that systems break and hull breaches multiply; a long search gives the submarine more time to fail.
• Proximity voice chat is the stated coordination channel. The developer's joke about slapping a crewmate who starts reading the manual mid-torpedo-attack is flavour, not a control.

Crew condition is also a factor the page calls out: food supplies, rest schedules and general wellbeing are managed between missions, and neglected crew become exhausted, seasick or delirious. A treasure hunt is a long, low-action task, which is exactly the sort of mission where those penalties would bite — though the page does not spell out a specific fatigue mechanic for salvage.

What is and is not confirmed for the demo and release

The free demo on Steam contains the single-player tutorial and two selected missions, and the Steam Next Fest version swapped in a brand-new co-op mission built for 1–4 players. The demo announcements do not say whether any of those missions is a treasure-recovery mission, so treat "the demo contains treasure hunting" as unconfirmed. If you want to test salvage specifically, the campaign in the full game is the supported place to look.

Timing is worth a note because early material and the store page disagree. The July 2026 announcement said Steam release in the first quarter of 2027 (other platforms TBC), while the Steam page and the October 2026 announcements give a release date of October 29, 2026. The store page also lists Windows as the platform; it does not list other platforms.

Practical preparation that follows from the store page

• Read the sonar and navigation stations before a search mission, not during one — the tutorial exists for exactly this, and the Next Fest demo added dedicated training stations.
• Bring a crew rather than treating it as a solo activity. The page advertises 1–6 player co-op in its short description and "up to four crew members" in the detailed description, and the demo's co-op mission is built for 1–4.
• Expect the submarine to misbehave during the search. The page's pitch is that sinking is "one wrong button away," and salvage is described as high risk rather than relaxed.
• Levelling unlocks gear and cosmetics; the page ties unlocks to playing and levelling, so repeated runs are how you build a crew loadout.

FAQ

What is treasure recovery in S.O.N.A.R.?

It is a mission type in the co-op campaign where the crew uses sonar to search the ocean floor for lost riches and artifacts, described by the developer as hunting treasure rather than fighting or sneaking.

Is treasure recovery its own game mode?

The Steam page lists Campaign, Team Deathmatch 4v4, Survival Mode and Tutorial training as the modes, and presents treasure hunting as one of the mission objectives — so it belongs to campaign play rather than a separate listed mode.

Can you hunt treasure alone?

The store page advertises 1–6 player co-op, and the demo includes a single-player tutorial, so playing with fewer than a full crew is within the advertised range. The page does not describe how a one-person crew handles a treasure mission.

Can I try treasure recovery in the free demo?

Not confirmed. The demo is documented as the tutorial plus two selected missions, with the Next Fest build swapping in a new co-op mission, and the announcements do not identify any of them as a treasure-recovery mission.