Source-checkedVehicles & ships

S-21 "Maria"

by DOXLUY_KOT · for Barotrauma

A combat boat for 3-8 people, it features a full range of weapons and good armor. Originally designed as a landing submarine, it has a spacious airlock and plenty of space for diving equipment. The…

1.0KDownloads
9 mo agoLast updated
Steam WorkshopSource

About S-21 "Maria"

From Steam Workshop

A combat boat for 3-8 people, it features a full range of weapons and good armor. Originally designed as a landing submarine, it has a spacious airlock and plenty of space for diving equipment. The…

A combat boat for 3-8 people, it features a full range of weapons and good armor. Originally designed as a landing submarine, it has a spacious airlock and plenty of space for diving equipment. The ship's heavy armament and armor come at the cost of its maximum speed. It also features a power distributor, allowing your engineer to more precisely manage the submarine's power grid.

Main Performance Characteristics

[table] [tr] [th]Characteristics[/th] [th]Description[/th] [/tr] [tr] [th]Class[/th] [th]Combat[/th] [/tr] [tr] [th]Price[/th] [th]15600[/th] [/tr] [tr] [th]Main Armament[/th] [th]1 magnetic cannon, 1 twin magnetic cannon, 1 railgun, 1 small slot. [/th] [/tr] [tr] [th]Auxiliary Armament[/th] [th]Discharge Coil, Bomb Launcher[/th] [/tr] [tr] [th]Fabricators[/th] [th]Fabricator, Deconstructor[/th] [/tr] [tr] [th]Cargo Capacity[/th] [th]8 Crates[/th] [/tr] [tr] [th]Spacesuit Racks[/th] [th]8 pcs[/th] [/tr] [tr] [th]Batteries[/th] [th]1 pc. - Capacity 500, Power 500[/th] [/tr] [tr] [th]Reactor[/th] [th]Power 4000 kW, Fuel Consumption -0.3[/th] [/tr] [/table]


The ship is part of the “Red Line” series of submarines, which has some common features:
-All submarines of the series are designed for your modifications during the game.
-All submarines of the series are created in a near vanilla style (without complex decorations).
-All APL series specifically have both characteristic strengths and weaknesses.

You can see other boats in this series here: https://steamcommunity.com/sharedfiles/filedetails/?id=3500533846

Archive: https://discord.gg/NYqfzNtQ

Highlights

From source data

Footprint

Rated a light load on a server.

Last update

Its author last shipped an update 9 mo ago.

S-21 "Maria" on Nxeon

From our catalogue
One-click install
Not available. One-click install isn't available for this game's mods yet. Download it and upload it to your server in Files.
Server load
light
Smallest plan we suggest
Barotrauma — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
2026-01-22, released 2026-01-22

Game versions by loader

LoaderGame versionsNewest
Workshop

From 1 recorded build of S-21 "Maria".

Run S-21 "Maria" on a Barotrauma server

Deploy a server above, then upload the file in Files.

What kind of mod it is

From the catalog
Listed on Steam Workshop as “Workshop”

Vehicles & ships

Cars, boats, aircraft, ships and other things to drive or fly.

Compatibility

Game
Barotrauma

Verified at the source

  • ✓Steam WorkshopOfficial listing, checked 2026-10-10Open ↗
  • ✓AuthorDOXLUY_KOT, as published on Steam Workshop
  • ✓LicenseNot published by the sourceFree

S-21 "Maria", answered

Generated from the mod’s own source data.

Is it free?

Yes. S-21 "Maria" is free to download from Steam Workshop.

How do I add it to my Nxeon server?

One-click install isn't available for this game's mods yet. Download S-21 "Maria" from Steam Workshop and upload it to your Nxeon Barotrauma server in Files.

NxLabs

Run S-21 "Maria" on a Barotrauma server.

Deploy in about a minute from $4.99 a month, then upload S-21 "Maria" in Files.