A series of {{Simulation Game}}s published by Ubisoft which place the player in command of a [=WWII=] submarine. The series has 5 entries, with the latest having been released in March 2010. ''[=SH1=]'' and ''4'' take place in the Pacific Theatre, while ''2'', ''3'', ''4''[='=]s expansion ("U-Boat Missions") and ''5'' place the player in the shoes of a ''Kriegsmarine'' U-boat ''Kaleun'' (short for ''Kapitšnleutnant'', "lieutenant") during the second battle of the Atlantic.

The series is primarily noted for its dynamic campaign mode: rather than using specific missions the game engine simulates ship traffic according to historical shipping lanes, convoy routes and traffic patterns. The player is given an assigned grid to patrol, but is [[WideOpenSandbox free to head elsewhere]] if they feel they can find better hunting grounds on their own.

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* {{Badass}}: If doing it right, one can amass as big a score (or bigger) as many famous [[TheAce submarine aces]].
* BloodKnight: Isn't it grand to see StuffBlowingUp?
* TheCaptain: The player, irrespective of your in-game rank.
* CoolBoat:
** ''[=SH3=]'' and the expansion to ''[=SH4=]'' include the [[http://en.wikipedia.org/wiki/Type_XXI_U-boat Type XXI U-boat]], the first true submarine and the ancestor of every submarine built post [=WWII=]. Using it is almost a completely different experience compared to the other subs in the series, especially when all six auto-loading torpedo tubes load faster than ''one'' manually-loaded tube on earlier U-boats.
** Subverted in that by the time they came around, you'll ''need'' all the advantages you can get. Historically, due to construction woes the Type XXI's were delayed to the point that only two are known to have made it to wartime patrol, neither of which had any sinkings. However, ''U-2511'' in its only patrol reportedly evaded the heavy cruiser ''HMS Norfolk''[='=]s escort screen, got within half a kilometer and actually had a perfect shot lined up... only to dive under the ''Norfolk'' and leave undetected, having received notice of Germany's surrender a few hours before.
* EarthIsABattlefield:
** In ''Silent Hunter 4'' they go out of their way to make this come alive, with such things as news reports from home and a view of the fleets that constantly move around the map.
** In ''[=SH3=]'' at least if using the right mods, you can receive radio intercepts mentioning such things as the sinking of ''HMS Royal Oak'', the declarations of war, reported enemy sightings... and hinted at-or-confirmed U-boat losses. (Some samples are mentioned in [[http://forums.somethingawful.com/showthread.php?threadid=3252655 this playthrough log]], with historical footnotes.)
* EverythingIsTryingToKillYou:
** And all you are doing is trying to kill people, innocent little you...
** Generally averted. Nothing that doesn't belong to the enemy pays much attention to you, and unarmed enemy vessels will attempt to flee if they see you. Although it can certainly feel like this at times.
* FriendOrFoe:
** it is possible to attack or be attacked by friendlies or neutrals. Best avoided though.
** Can get quite frustrating in the early months of a ''[=SH3=]'' campaign, as you'll be forced to let dozens of juicy targets loaded with what is ''obviously'' war material get away from you because they're wearing the Stars and Stripes.
** Or worse yet, ''the damned Norwegian shipping''.
* GameMod:
** [[http://www.subsim.com Subsim]] has a whole boatload of them for almost every game in the series, most of which are designed provide an [[UpToEleven even more realistic]] play style. With full realism and improved ASW AI, NintendoHard doesn't begin to describe it.
** At least one mod results in ''Silent Hunter 4''[='=]s AI tactics/skill improving as the years go by, though fortunately you keep your technological upgrades.
** Especially the "supermod" Grey Wolves Expansion, GWX for short, and its monster of a manual, which is affectionately referred to as "Das Buch".
* HomeBase:
** Pearl Harbor or Australia in ''Silent Hunter 4'', though you have a pick in the U-boat versions. An important event in the Atlantic Theatre installments is the fall of France, allowing the U-boats direct access to the Atlantic from the French ports.
** The SceneryPorn here gives the impression of a NotSoSafeHarbor. Sometimes literally so: collisions are always a worry, and U-boat skippers have to worry about air raids on the port.
* KatanasOfTheRisingSun: The enemy in ''Silent Hunter 4'' is the Imperial Japanese Navy.
* NazisWithGnarlyWeapons: Inherent in the majority of the games, which are about the ''Kriegsmarine''.
* NintendoHard:
** Remember in ''Film/DasBoot'', that caption at the beginning saying 75% of U-boat crewmen didn't survive? ''[=SH3=]'' makes it abundantly clear why: late-war Allied [=ASW=] is obscenely good.
** This is especially true at the highest reality settings, where you are restricted to what skippers of the time had, and so you need to be constantly doing calculations and approximations to put your torpedoes on target or evade escorts. Not counting the fact that you have to deal with limited fuel (for cruising on the surface), batteries (for moving underwater), air supply (CO2 content slowly rises over time) and compressed air (for fast diving or rising in the water), as well as long reload times and extreme vulnerability to depth charges.
** On the other hand, historically submarine captains would be assisted by weapons officers, which (along with automatic/manual targeting) is an option in the games.
* NoSwastikas: For obvious reasons. The best example is the battleship Bismarck, where there're just two white circles in the deck with nothing inside.
* {{Pirates}}: Otherwise known as commerce raiders: what you are, without you taking the loot. While you can go after warships instead, the average tonnages pale in comparison to that found by hunting cargo and merchant ships.
* RammingAlwaysWorks:
** Well, ''sometimes.'' In ''Silent Hunter 4'', at the very least, you can simply ram your boat into small fishing ships like sampans, instantly sinking them with no damage to you and no waste of ammunition; however, you get no credit for ships sunk in this fashion, either.
** And as one [[LetsPlay Let's Player]] discovered in that same game, be careful at what angle you shoot down airplanes...or their crashing, flaming wreck can '''''slam directly into you''''', sinking you instantly. [[http://www.youtube.com/watch?v=j4Z3tnoIZig jump to 50:49.]]
* ReassignedToAntarctica: the fate of a captain that does not satisfy his superiors.
* RPGElements: Crew members will gain experience as they progress through more missions, and the captain can gain Renown, which he can spend on improved gear or better U-boats.
* SceneryPorn: The latest installments (''Silent Hunter 4'' and ''5'') have very impressive graphics.
* ShoutOut: To ''Film/DasBoot''. There's a single mission in ''Silent Hunter 3'' that has you in command of the U-96 attempting to sneak through Gibraltar defenses to enter into the Mediterranean Sea.
** The [[RealLife real]] U-96 also attempted that.
** Other single missions have you in the middle of famous WWII naval battles, for example the sinking of the battleship Bismarck in ''Silent Hunter 3'', or the Battle of Leyte Gulf in ''Silent Hunter 4''.
* SilentRunningMode: Either manually (low speed, deep dive, no noisy activities like reloading torpedoes) or through an actual "silent running" button, depending on the game.
* SinkTheLifeBoats: it is actually possible to do this, if you are mean enough.
* ThereIsNoKillLikeOverkill:
** Averted; you have a limited amount of ammunition, and you have to try and make every torpedo count. Hitting an ammunition carrier or warship magazine can have spectacular results though.
** In the case of ''Silent Hunter III'', you start with a Type IIB (called "IIA" in-game) with only ''five'' torpedoes.
** [[http://www.viddler.com/explore/JadeStar/videos/210/ On the other hand]], besides the fact that it's a waste of ordinance there's nothing really stopping you from putting a 280kg warhead designed to break cargo ships in half [[http://www.viddler.com/explore/JadeStar/videos/211/ into a PT boat]] [[http://www.youtube.com/watch?v=j2BW8QjBYkU or fishing canoe]].
* TrappedBehindEnemyLines: Your assignment is to deliberately go behind enemy lines.
* {{Unwinnable}}: It's impossible to actually change the tide of the war, at least in ''Silent Hunter 3'' -- no matter how many ships are sunk by your U-boat, Germany still surrenders in May of 1945... if you even survive that long.
* UnwinnableJokeGame: In missions where you command a German U-boat, no matter now many vessels you sink, Germany (fortunately) will always lose the war.
* VideoGameCaringPotential: In Silent Hunter I you get missions to rescue shot-down pilots during air raids. To do that, you often have to get dangerously close to the enemy base where the water is too shallow to hide ... all while under time pressure as the pilot will eventually drown.
* VideoGameCrueltyPotential: In Silent Hunter IV you have the option of sinking helpless fishermen.
* WarIsGlorious: When played on a computer it is.
* WarIsHell: Both when you think about what you're doing (as the crew in ''Das Boot'' saw), and when the enemy bites back... oh, how they bite back...
* WarriorPoet: The opening cinematic for ''Silent Hunter 4'' includes a lengthy quote from Milton.
* WorldWarII

Not be confused with Tropers/SilentHunter, a troper.