UBOOT is a simulator of a submarine from WWII era. It is a survival sandbox with crew management mechanics while its primary theme is life of German soldiers like in Wolfgang Petersen's film Das Boot. The boat is their home, but it can become their grave at any time.
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Available: 2018


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September 12

September Update

Hello friends!

We hope that you had a great holiday.

The day has come when we can share the news about our development again. We did not disappear, we worked as usual. UBOOT is an integrated part of our existence lately ;)

The game is getting more and more full of shape. As usual, we changed some old things that seemed to be good before, but in time with our experience increasing they had to evolve into better form. We have also added quite new things that we hope will appeal to you.

You must be impatient, so let's get to the point.

Conning Tower Upgrades
We've expanded our upgrades list with 5 conning towers. These are shipped with extra AA guns at no charge.

Turm 0

Turm I

Turm II

Turm IV - LM 42 U

Turm IV - Quadruple LM 43 U

In our quest to let the player manually control as many devices on the boat as possible (if he wants to), we've implemented manual hydrophone in UBOOT. It's a pretty realistic implementation that allows for adjusting the listening frequency and accounts for the variable sound frequency diffusion in the water.

Along with the hydrophone, we had to upgrade the audio system in UBOOT to make distant sounds be more realistic and behave correctly under water. That adds extra immersion and it was necessary to make the hydrophone right.

We have been working hard on our animations lately. There are tens of new animations for the crew to make the boat more lively and convincing. We're still not done yet, but it's a major improvement. Some of them include:
  • We now have a fully animated torpedo maintenance and loading. Woohoo! That was a pretty complex process to animate.
  • Depth steers both manual by rotating the wheel and automatic.
  • Diesel engine maintenance animations.
  • Relax animations: sleeping, reading magazines, smoking, playing cards etc.
  • Observation animations using the binoculars.

So much aggression..

Somalia pirates DLC.

It's a bug or feature.. I really don't know!

WW2 subsim games are all about sneaking and hiding and our detection mechanics had to evolve appropriately. From now on there are 7 detection mechanisms: visual, passive sound, active sound, radar, radar detector, radio and information (from HQ or other allies). Most of them can be either direct or indirect.

Indirect detection in UBOOT means that specific objects in group cannot be distinguished. Your crew may spot a smoke at the horizon or just hear some distant group on the hydrophone. What you know is that there is a group of something out there and depending on the detection method you may know, if these are ships or airplanes, estimate the size of the group, its position and even speed.

In general there are many factors affecting the detection chance. Some examples of factors that are implemented in UBOOT:
  • Smoke screens, regular smoke from fires, fogs and physical objects block the line of sight.
  • Detonated depth charges, shadow zones, seabed proximity, physical objects and stealthy hull covers affect sonar detection.
  • Devices on the ship, shadow zones, propeller cavitation and surface proximity affect hydrophone detection.
  • Radio transmissions make all destroyers go in your direction. Weird.

Most factors can be quickly reviewed in a detection notification tooltip.

As you can see now there are many factors for tactical minds to consider.

Meters around the boat had been massively improved to be historically accurate, easily readable and to have a high resolution textures. Friendly member of our community has kindly photographed for us U-995 meters from up close, so we will probably improve them a bit further, if there is something wrong.

We've started scripting these meters to make them indicate correct values. This process will probably be finished for our next update.

Gyrocompass repeater

Revolutions per minute

Telegraph, rudder.

Revolutions per minute

From now on you can spot living crew on other ships too. In case of danger they evacuate the ship on pontoons.

That's still an early work in progress, but you can see it on the video.

Subsurface scattering
To make the crew more lively and convincing we've implemented screen-space subsurface scattering into UBOOT. It's a technique that tries to simulate the realistic light propagation in human skin. We did our best to keep the implementation fast and reasonable as many SSS techniques are widely known performance killers.

Better atmospheric scattering
If one would compare our newest video with any of the older ones, we're sure that the atmospheric effects improvement will be very apparent. Previously we've been using single ray scattering, but now we've implemented approximate multiple scattering. It improves the look of horizon, distant objects and fogs.

We felt that it's important for a game like this as the camera is always in the open space.

Notice that parts of the image covered by fog become blurry.

Environment objects and sea animals
It's a work in progress actually as our animals have their models and animations in production, but you can hear them on the hydrophone. We've used actual recordings kindly supplied by NOAA to make our underwater environment sound convincing. It adds a lot to the immersion when you pick these little guys on the hydrophone too, not just the propellers. Also.. swimming among them may help you stay undetected.

Besides that, icebergs are now generated in areas with cold climate. They may hide your boat or your enemies from the view and provide tactical advantage.

More ships
Our talented 3D artists are now working on a second batch of ship models. You can expect to see the results in the next update.

This time some freighters are going to join the party as currently we're still having just the Liberty in the game.

New effects
There are new effects in UBOOT:
  • Bow spray.
  • Water gushes.
  • Improved chimney smoke.
  • Improved bow waves.
You can see them in our new video. Let us know, if they are okay.

Note: new, tweaked bow waves can be seen only on the Flower corvette near the end of the video.

Periscopes and binocular
Previously only our attack periscope was manually useable. From now on also observation periscope and targeting sight on the conning tower can be used by the player.

Damage system improvements
Hulls of non playable ships are now composed of compartments too that are sealed by the crew when needed. Internally it's not a visual element, but math thing.

It's resultant effect is that ships now don't just sink vertically, but as their center of mass changes from the flooding water they may also rotate in many different ways like it's commonly seen on WW2 sinking ship photos. That also makes some parts of the ship more vulnerable than the others.

We've also added other improvements to our damage system like secondary explosions from torpedoes stored on the deck etc.

Diseases now spread among your crew, especially in cold regions. It's a good idea to take antibiotics on the northern trips.

Further sandbox experimentation
We are progressing further on our quest to add interesting long term gameplay elements into UBOOT. We always had an idea what we want, but still it's something new to the WW2 subsim genre and definitely requires taking one step at a time.. but we are getting there!

As many of you have pointed out, turning the wages of war seems like a great addition to the game and gives the player actual goals to pursue, but it's also pretty tricky when it comes to realism as you control just a single boat. We did our best to make it convincing and let the player choose the degree of this impact, but it still felt like half-measures.

We are currently working on a system of promoting your officers, including skippers, to the HQ. That's something that was happening in the history pretty often and that lets us expand player's reach. Only trained and experienced officers can take such path in their career. When they go to HQ they are still your people and you can assign them projects to work on. It's like a tech tree - using their influences they may support researching new technologies for the Kriegsmarine or Luftwaffe, complete engineering projects like the Goliath transmitter and support undergoing military operations.

We would love to hear some feedback about this as we are getting many great ideas from your comments. Kind thank you upfront!

Release date
We are not maniacal perfectionists and would really like to give that baby to the community as soon as possible, if for nothing else, just to earn something on our hard work. Our goal though is to make a good game that will stay around for years and we are still not at this point. Process to get there doesn't let us release a small game and expand it into a big thing - there aren't many cases like this in the gaming history.

In its current shape UBOOT is still not playable due to our far reaching design decisions. There are still lots of missing assets like animations, voices, icons and there are missing gameplay features too. Some of them are pretty basic stuff like AA guns not working and having just the Liberty to hunt on, while other are pretty complex issues to resolve.

There aren't any big risks for the production on the road, but we will have to test your patience. We are very thankful for your investment in our project and we keep doing what we believe is the best option to make UBOOT a successful project.

We definitely won't make it in 2017 and will keep you updated with each update how our progress is shaping. We still don't declare any specific date for many good reasons, but you can be sure that the release is going to happen as soon as that will be possible. As you can see, we are working very hard to make that happen and present many exciting additions to the game with each update.

Popcorn ready? Let's watch the movie.


Thank you for your continued support!

Deep Water Studio
177 comments Read more

June 22

Development update

Take a look at our progress since March summed up below.

U-boat Interior

With the arrival of conning tower, bow torpedo room and stern torpedo room models, interior of the u-boat is now officially finished! It's probably the most precise reproduction of VIIC interior to date yay!

Bow Torpedo Room

Stern Torpedo Room

Stern Torpedo Room

Stern Torpedo Room

Conning Tower

Conning Tower


We've finally been able to put work into upgrades for the boat and we've made quite a few of them! Fully working upgrades that recently made it into the game:
  • Additional Compressor
  • Anti-Sonar Coating „Alberich”
  • Net Cutter
  • Reinforced Pistons
  • Compressors (Diesel)
  • Snorkel
  • Anti-Radar Coated Snorkel
  • Elastic Elements (Diesel / Electric)
  • GHG
  • KDB
  • SU-Gerät „Nibelung”
  • GHG-Balkon
  • Netzabweiser Antenne
  • Stabantenne
  • FuMB 1 „Metox”
  • FuMB 7 „Naxos I”
  • FuMB 26 „Tunis”
  • KZG 44/2 „Kurier”
  • Accumulators I / II / III
  • 8.8 cm Cannon
  • Trim Pump Upgrade
  • Toilets Upgrade
  • Conning Tower Reflector
These upgrades are also distributed for other u-boats. There are also quite a few modules for Allies that include radars, direction finders etc. All of these technologies must be researched first to be available for the player or enemies.

FuMB 26 „Tunis”

KZG 44/2 „Kurier”


Major Terrain Improvements

This part was really time consuming. It's a very hard task to render terrains at arbitrary zoom levels with a satisfying performance like Google Earth using only offline data. We had a hard time with places like Gibraltar, Peninsula Spit, Helgoland and Scapa Flow as even the most precise global elevation data kindly shared by NOAA couldn't model them correctly. Finally we have improved our approach. We now use data shared by NOAA to model elevations and vectorized cartographic data to model shores.

Aside from that, we've improved terrain quality dramatically, but we will probably keep improving it further.


Submariner life wasn't the easiest in World War II. Accumulators on u-boats were in a constant danger of being flooded, releasing chlorine gas in such event. Even the oxygen could be deadly. Thing with oxygen is that it's extremely dangerous when its under a high pressure. Apollo 1 is a tragic example of that oxygen property.

It's something to keep an eye on for a wise player in UBOOT from now on. Be sure to isolate flooded compartments or things may get very bad quickly!

Submarine Pens

Player can now dock at all historical submarine pens and ports in Germany, France, Poland, Romania, Greece and so on. It's a safe place to resupply, upgrade your boat and manage your crew.

Ship and torpedo effects

We've improved bow and stern waves for the ships and added foam trails for torpedoes. Water flows out of the holes in a hull after submarines emerge from the water.


Our ships list has been massively expanded since the last update. Ships that are currently in the game are:
  • Admiral Hipper Cruisers, Kriegsmarine
  • Black Swan Sloops, Royal Navy
  • Bogue Escort Carriers, U.S. Navy
  • Allen M. Sumner Destroyers, U.S. Navy
  • Casablanca Escort Carriers, U.S. Navy
  • Deutschland Heavy Cruisers, Kriegsmarine
  • Fishing Boats
  • Flower Corvettes, Royal Navy
  • Gnevny Destroyers, Soviet Navy
  • Liberty Freighters, U.S. Navy
  • Motor Torpedo Boats, Royal Navy, Royal Canadian Navy
  • Type 1934 Destroyers, Kriegsmarine
  • Porpoise Submarines, U.S. Navy
  • Rio de Janeiro Freighter, Kriegsmarine
  • T2 Tankers, U.S. Navy
  • Tribal Destroyers, Royal Navy, Royal Canadian Navy
  • U-Class Submarines, Royal Navy
  • V-Class Destroyers, Royal Navy
  • F-Class Destroyers, Royal Navy
  • Type VIIC U-Boats, Kriegsmarine
  • Type VIIB U-Boats, Kriegsmarine
  • Type IIB U-Boats, Kriegsmarine
  • Type XIV U-Boats, Kriegsmarine
You can see some not in-game screenshots of these ships below.

Bogue-class escort carrier

Gnevny-class destroyer

Deutschland-class cruiser


We've started to introduce modding to the game. We've migrated most of our data to Excel spreadsheets to make it easily readable, moddable and internally it helps us to work on these files simultaneously.

External Operations

We've put some work into external operations that you can run with your crew on the land or on other ships.

Players now can loot evacuated ships or wrecks, run diversions, place weather stations etc. For each operation, you can choose an officer, size of his team and optionally some equipment like a diving suit or weapons, if you find it suitable for that mission.

We have been working on that for some time and it's now finished. We've tried to keep it reasonable and base our ideas strictly on historic references.


Getting a good intel isn't worse than sinking ships. Convoys and all interesting things can be now reported for a budget reward!

Beware though, enemies are listening for the radio transmissions and you may find yourself with the pants down quickly, if they will detect you.

Campaign Customization

When a new campaign is being launched it may be customized to the player's liking. Aside from things like difficulty and iron man mode, there are settings like campaign duration, realism of player's impact on history and many simulation settings.

Campaign duration affects how many days are skipped in-between. It's mildly similar to what Sid Meier's Civilization series do with years between turns. This way a full campaign from 1940 to 1945 can be played as "fast" as 25 hours or as long as 80 hours.

Simulation realism settings include dud torpedoes, periscope stabilization, perspective enforcing etc. Most of the usual realism settings, present in other simulators like limited oxygen, are forcefully on as the inseparable parts of the game. Don't worry though, we've ensured that these things are enjoyable!

After setting up a campaign, you can choose your first u-boat from those that are currently available and start the initial mission. After that you are free to roam the map or request some missions related to the currently ongoing military operations on the map.

Impact on History

We've carefully analyzed your feedback on this subject and we were working on that part ever since. We've decided to let the player choose how big this impact on history should be. Let's put it aside though and discuss how it works.

Playthrough in UBOOT is divided into quarters. At the end of each quarter there is a quarter summary that outlines historical events that happened (with photos), new technologies that were researched, treaties that were signed and also contains cool charts to visualize your progress.

All that happens in the game will be 100% historical, if you won't do anything, but if you will for example find a convincing evidence for the Normandy invasion or will be very effective at sinking enemy convoys with your wolfpacks, you may noticeably deviate from the history in that playthrough.

There is no way to win the war though as United States eventually develop an A-bomb. At that point it's going to be an honourable surrender of the army in a face of the devastating weapon instead of being defeated and forcefully surrendered.

There is also a possibility that player actions will be so bad... that war will end sooner :) Such player may, for example, loose a few hundreds of u-boats. In the ending summary he will find out that Kriegsmarine has destroyed itself and Allies didn't really had to worry about it.

Release Date

Now is the hard part. We still have to ask you for some patience and can't responsibly declare a release date yet.

Thanks to the kindness and continued support of PlayWay we now have a fully secured budget to finish this game, no matter what happens. We are going to use that opportunity and finish our game right to the end without compromises on quality.

We have already finished many areas of the game, but we still need important assets like animations, models, interfaces and well.. lots of icons. There are still some bugs and campaign missions still need work to be in a playable shape.

We will declare our final release date in upcoming months as soon as possible. It may happen any day really, but sadly not today.

Thank you for your continued support.

Deep Water Studio
188 comments Read more

About This Game

UBOOT is a simulator of a submarine from WWII era, yet different than all you have seen so far. It is a survival sandbox with crew management mechanics while its primary theme is life of German soldiers like in Wolfgang Petersen's film Das Boot. The boat is their home, but it can become their grave at any time.

In UBOOT you control the crew to control the boat. You look after their physical and mental health, because if the sailors are hungry, tired and their spirit is low, there’s no chance of winning even a skirmish. It is important to balance the overall discipline and trauma of your crew. If you are a harsh captain, the level of both goes up. When trauma is high a secret feature of each sailor can be disclosed. It can reveal his alcoholism, make him go berserk, he can also turn out to be a coward or a spy.

Kriegsmarine Headquarters will give you key missions to move forward with the historical stages of WWII and you will be able to fight in new regions, and install better equipment in a dock. Unfortunately, the opponents will also grow stronger and, for example, will equip their ships with radars or break the Enigma code.

In UBOOT each sailor will have his own face, his story, personality, skills and weaknesses. The sailors will come either to report something to you or just to talk some problems over. They will eat, talk, enjoy simple pastimes, queue to the only toilet on board, fight to decide whose girlfriend is prettier. You will see the lives of grey wolves in all its glory.

System Requirements

    • OS: Windows XP SP3 / Vista / 7 / 8
    • Processor: Core i3 3.1 GHz or AMD Phenom II X3 2.8 GHz
    • Memory: 4 GB RAM
    • Graphics: GeForce GTX 560 or Radeon HD6870 with 1GB VRAM
    • DirectX: Version 9.0c
    • Storage: 4 GB available space
    • Sound Card: DirectX compatible
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