''Samurai Warriors'' is a spinoff of Koei's ''VideoGame/DynastyWarriors'' HackAndSlash, porting the gameplay elements to a new setting: the [[JidaiGeki Sengoku period of Japanese history]]. The playable scenarios span fifty years of Japanese history, and playable characters include UsefulNotes/OdaNobunaga, UsefulNotes/TokugawaIeyasu, UsefulNotes/ToyotomiHideyoshi, UsefulNotes/SanadaYukimura, UsefulNotes/IshidaMitsunari, UsefulNotes/MiyamotoMusashi, UsefulNotes/HattoriHanzo, UsefulNotes/FuumaKotaro, and many more. It should be worth noting that each version loosely sticks to a certain time frame and focuses on specific moments: case in point, the first game is all over Nobunaga while the second game's primary focus are the events leading to Sekigahara, and the third appears to try to cover just about everything in-between.

Some of the playable battles:
* September 10, 1561: The Fourth Battle of Kawanakajima: Takeda vs Uesugi
* January 25, 1573: Battle of Mikatagahara: Oda vs Takeda
* June 28, 1575: Battle of Nagashino: Oda vs Takeda
* June 21, 1582: The Incident at Honnoji; Oda Nobunaga vs UsefulNotes/AkechiMitsuhide
* July 4, 1582: The Battle of Yamazaki: UsefulNotes/AkechiMitsuhide vs Toyotomi
* October 21, 1600: The Battle of Sekigahara: East (Tokugawa) vs West (Ishida)
* Winter 1614 - Summer 1615: Siege of Osaka Castle: Tokugawa vs Toyotomi
and many, many more

Some scenarios are "[[{{Elseworld}} What if's]]," such as Nobunaga surviving Honnoji and uniting Japan, or Hideyoshi faking his death in 1598 and appearing at Sekigahara (both examples are their respective hidden "Dream Stage" battle). In other cases, some of the "Dream Stages" are just for fun, like Tadakatsu taking on all worthy warriors in a champion's tournament or Nohime and Oichi's beauty contest battle (made even funnier if played with the [=SW2=]: Xtreme Legends expansion).

The voice acting is goofy at times (witness Hideyoshi declare, "Let's make our enemies beg us for peace!" and BadAss Honda Tadakatsu's borderline lisp), and the difficulty encompasses downright stupid allied NPC's and enemy officers who love to gang up on you, but you'll learn something about Japanese history; just remember that Tokugawa Ieyasu did not actually fight the Battle of Sekigahara with a spear that shot cannon balls.

The series encompasses:

* ''Samurai Warriors'' / ''Sengoku Musou'' (PS2, 2004)
* ''Samurai Warriors: Xtreme Legends'' / ''Sengoku Musou Moushouden'' (PS2, 2004)
* ''Samurai Warriors: State of War'' / ''Geki Sengoku Musou'' (PSP, 2005)
* ''Samurai Warriors 2'' / ''Sengoku Musou 2'' (PS2, X360, 2006)
* ''Samurai Warriors 2 Empires'' / ''Sengoku Musou 2'' (PS2, X360, 2006)
* ''Samurai Warriors 2: Xtreme Legends'' / ''Sengoku Musou 2 Moushouden'' (PS2, X360, 2006)
* ''Samurai Warriors Katana'' / ''Sengoku Musou Katana'' (Wii, 2008)
* ''Samurai Warriors 3'' / ''Sengoku Musou 3'' (Wii, 2009 [JPN], 2010 [US/EU]. [=PS3=] version coming soon in 2011 [JPN], combining the contents of this and below.)
* ''Samurai Warriors 3 Xtreme Legends'' / ''Sengoku Musou 3 Moushouden'' (Wii, 2010 [JPN])
* ''WarriorsOrochi'' / ''Musou Orochi'' (DynastyWarriors CrossOver; PC, PS2, PSP, X360, 2007)
* ''Warriors Orochi 2'' / ''Musou Orochi Maou Sairin'' (DynastyWarriors crossover; PS2, X360, 2008)
* ''Samurai Warriors Chronicles'' (Nintendo3DS, 2011)
* ''Sengoku Musou 3 Empires'' ([=PS3=], 2011)
* ''Warriors Orochi 3'' / ''Musou Orochi 2'' (DynastyWarriors crossover; [=PS3=], [=X360=], 2012)
* ''Sengoku Musou Chronicle 2nd'' (Nintendo 3DS, 2012)
* ''Samurai Warriors 4'' ([=PS3=], PS Vita, [=PS4=], 2014)
* ''Sengoku Musou Chronicle 3rd'' ([=3DS=], PS Vita, 2014)

See also ''VideoGame/SengokuBasara'' - which is what many say these games would be like on drugs, and ''VideoGame/PokemonConquest'' which uses the character designs from ''Samurai Warriors 3.'' See also ''VideoGame/NobunagasAmbition'', which uses the character designs from the series often and it's gameplay is the basis for ''Pokémon Conquest''.
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!This franchise features the following tropes:
* AluminumChristmasTrees: Western neophyte players in particular might just be surprised at how much of what's presented in these games is based closely on ''historical fact''.
** For example, the "star-crossed lovers" arc for Oichi and Azai Nagamasa? Yep, that one's out of Japanese history, as is [[spoiler:her death at Shizugatake, albeit the game has her fighting alongside Shibata Katsuie, who was her husband after Nagamasa, instead of committing ''seppuku'' with him]].
* AwesomeButImpractical: Less Awesome but more fun, In ''[=SW2=]'', Nene has a skill in which she can transform into any nearby character...even enemy ones. Yes, even those countless mooks you'll probably spend a lot of your time mercilessly butchering.
** In ''[=SW2=]: Empires'', custom characters using the sword, spear, naginata or Nene's moveset can use this skill too.
* BadassBoast: Typical to any "KOEI Warriors" game.
-->'''Tadakatsu Honda:''' I am a man of peerless might!
* BottomlessMagazines: All of the gun-type weapons have unlimited ammunition and don't need to be reloaded manually by the player (but there is a token effort at animating reloads during combos). Generic NPC riflemen reload between shots, though.
** It's worse with Masamune Date, because he can rapidfire his pistol, spraying waves with his Musou.
* CameraAbuse: In pre-rendered cutscenes, specially the first one of Oda or Noh, you can see blood splatter on the camera.
* CameraCentering
* CastFullOfPrettyBoys: Somewhat [[JustifiedTrope justified]] in that this is a game that revolves around battles fought in feudal times, so it would be strange for there to be a particularly equal balance of the genders - indeed, that there are female characters taking part at all is, for the most part, unrealistic. On the other hand, it would take a Social Darwinist of [[CodeGeass Britannian proportions]] to claim that the upper classes ought to all be so damn [[{{Bishonen}} pretty]].
* CatchPhrase: The characters' personal variations of "Enemy Officer Defeated".
* CrossOver: ''VideoGame/{{PokemonConquest}}'', in the sense that the character designs for the Warlord cast -- Nobunaga, Oichi, Mitsuhide, Shingen, Kenshin, etc. -- are ''all'' lifted directly from ''Samurai Warriors 3''.
* CriticalAnnoyance: Whenever an officer is just knocked down but barely took a scratch damage.
-->'''Hideyoshi Toyotomi:''' Gah! Where are my reinforcements!
-->'''Ginchyo Tachibana:''' Don't waver! The Tachibana will not be beaten!
* CriticalExistenceFailure: Every CPU-controled officer is this. It's even worse if your side's morale is too low or if they are generic officers.
* DarkReprise: The final stage of ''Chronicles'', the Osaka Summer Campaign, features a melancholy remix of the main theme, fittingly titled "Grief".
* DepartmentOfRedundancyDepartment: Hideyoshi's 'One-day Castle' song back in the first game (in Siege of Inabayama) is this:
-->''Beeeehold the castle, that is built in just one day!\\
What genius could have done this, you say?\\
It's Hideyoshi, Hideyoshi we praise!\\
Who built the castle in just one day, wheee!\\
It's Hideyoshi, Hideyoshi we praise!\\
He built a castle in just one day!!
* EarlyInstallmentWeirdness:
** First game has castle stages where you play your character alone without allies (although there are few certain stages where you have your commander as your only ally, such as Nobunaga in Ranmaru's story and Yukimura in Kunoichi's story). While this is not actually bad and offers fresh and new challenge for fans of Koei's Warriors franchise, not everyone can love it. This may also why castle stages never appear again.
** Mostly averted for first Xtreme Legends expansion.
** First Empires expansion is Samurai Warriors 2 Empires. The weirdness is only meta: it's released ''before'' Samurai Warriors 2 Xtreme Legends, which is unusual for Koei's Warriors franchise.
* ElaborateEqualsEffective: Played straight with the various weapons.
* EscortMission: Hampered by bad AI, par for the course with any others.
** Particularly noticeable in the first game if playing on the Oda side at Honnouji as anyone except Nobunaga, as when he's a NPC he absolutely ''insists'' on killing any and all enemy peons in the way instead of high-tailing it to the escape point.
* {{Flanderization}}: Par for the course with Koei and expanding character rosters.
* GameplayAndStorySegregation: Playable characters can be unlocked for use as subofficers, albeit only useable one at a time. This makes it very possible to be say, fighting against Mori Ranmaru ''alongside Mori Ranmaru''.
* GuideDangIt: Getting your ultimate weapons. All of them involve doing very difficult things at very specific points in the battle on Hard or greater difficulty. And there's ''no hint whatsoever'' in the game itself about what you're supposed to do.
** ''3'' is a bit better about this: you just have to complete every (usually optional) tactical advantage objective in a certain battle on Hard or above. ''Which'' battle is still guesswork, however.
* GrappleMove: some characters have grab moves in their movesets. like [[FragileSpeedster Nene]]'s unblockable SpinningPileDriver grab move (though it's pretty weak). The Grabs' main advantage is that they are unblockable, with the obvious disadvantage of being rather hard to aim due to the combat being done in three dimensions.
* HardModePerks: Like in DynastyWarriors, you get better weapon/item drops and increased stat gain.
* HistoricalBadassUpgrade: Most of the cast. Granted, some of those ancient warriors were actually pretty badass on their own....
* HistoricalHeroUpgrade - A rather surprising treatment of UsefulNotes/OdaNobunaga from the second game on (for [[AntiHero certain values of hero]], anyway).
* HistoricalVillainUpgrade: UsefulNotes/FuumaKotaro wasn't a nice man at first, but he certainly isn't a chaos-worshipping {{Troll}} in real life. Also averted with newcomer from Chronicles 2nd, [[UsefulNotes/YagyuJubei Yagyu Munenori]]. He's been a victim of the trope so many times (''especially'' {{Onimusha}}), but for his debut, he's a willing supporter of the Tokugawa clan to end the war, and is all around a just, virtuous, badass swordsman.
* HollerButton - The ability to summon a horse, exclusive to Keiji, Yukimura and Toshiie. If you don't have one, they will summon a generic one.
** Made universal from the third installment. You can even summon a generic horse out of nowhere if you didn't start with one.
* ImprobableWeaponUser: Yoshimoto Imagawa kicks a Kemari (ancient oriental soccer ball) in almost all of his moves. His main weapon is a simple cutlass/sabre though. Oichi uses a Kendama (child's puzzle toy) in her first appearances, but from the third game on, she switches to a bunch of barbed chakra. Shingen Takeda uses a fan. That one did actually occur historically, although only once, in a single incident.
** Oichi's case is explained in the interlude, where it clearly states she took ahold of the first thing she could find to use as weapon. And her weapon behaves like a MACE.
* KatanasAreJustBetter: Inverted as few characters use them.
** But the few that do make it true to the trope. Akechi's Specials, for example, allows him to quickly flash past an enemy and damage them, or to counter for great damage.
* KeyStoneArmy: Scripted twists (such as body doubles and dramatic entrances) aside, as soon as the commander of the opposing force retreats clutching his side/keels over dramatically, the rest of his army beats it regardless of numbers.
** Of course, with how many of them you were likely cutting down before defeating the commander, it's amazing they wait that long to get out of your sight.
* LeeroyJenkins: If you're not the one Leeroy-ing into the crowd, expect one or more of the AI-controlled officers to charge recklessly and then necessitate you bailing them out. There are even a few stages that ''penalize'' you for getting ahead of yourself.
** And a very unusual case of the game forcing you into one: at the end of Yukimura's story mode, he decides the final battle a lost cause, the game invalidates the defeat conditions and declares everyone but you expendable, a path straight to the enemy camp (but swimming in enemy soldiers) opens up, and in [=SW3=] your items are disabled. Why push you down the road of a totally reckless charge? Because historically, ''he actually did that''.
** Nagamasa Azai, Battle of Anegawa. Even if he is exhausted, he will continue pressing the attack until he is forced to retreat or he forces nobunaga Oda to retreat.
--> '''Nagamasa Azai''': ''"This is it. This will be my final attack!"''
** Nene's Dream, Melee at Sekigahara. even with Okuni and Kobayakawa on your side, you STILL end up doing most of the fighting.
* LoveAcrossBattlelines: Oichi and Nagamasa in some scenarios.
* MiyamotoMusashi
* MoraleMechanic: The series eats and breathes morale. Morale determines who wins the battles when you're not in the area, and can make enemies harder to fight if they have a lot of it. You can reduce overall enemy morale and raise your own by killing troops, defeating enemies, and activating (or preventing) certain events. To take it even farther, individual troops have their own morale. Killing a troops leader causes him to run off. Defeating an officer has the potential of making everyone run.
* MovingTheGoalposts: Tachibana (of all people) pulls this on you in the third-to-last normal mission in ''katana''. Never mind that the part up to it is a bit of a GuideDangIt as to how you're supposed to strafe, no, she wants you to defeat 30-ish enemies [[FakeDifficulty without any attack successfully landing on you.]] The enemies do include [[GoddamnBats Kunai-throwing ninjas]]. Fortunately, she doesn't make you fight her without taking damage, saving it from becoming ThatOneLevel.
* {{Multishot}}
* NamesToKnowInAnime: NobuyukiHiyama voices Date Masamune AND Fuma Kotaro, once again proving that he's no PigeonholedVoiceActor.
* NameOrderConfusion: The western releases are bad about this, as [[DynastyWarriors Koei's other games]] tend to have the the surnames first and given names second but in Samurai Warriors given names are written before surnames.
* NeverASelfMadeWoman: [[JustifiedTrope Justified]] as it's (mostly) based on historical events in 1500s Japan.
** [[BadassBoast "Not just any woman! A Tachibana!"]]
* {{Ninja}}: Both peons and a few playable characters. See characters page.
* OffModel: A custom warrior using a moveset with a unique mounting animation can result in very obvious clipping into a horse's back if the models are of different size.
* ThePowerOfFriendship: Naoe Kanetsugu goes on at length about it. Several characters tell him to shut up.
* PreAssKickingOneLiner: As standard for a ''Warriors'' game, used for full effect during [[CallingYourAttacks True Musou attacks]].
* PrettyInMink: Some of the clothing options (at least for original characters) include a cape and hat trimmed with white fur.
* [[AutoScrollingLevel Rail Shooter]] [[DoesntLikeGuns With A]] [[KatanasAreJustBetter Katana]]: Samurai Warriors Katana for the Wii.
* RedshirtArmy: Pretty much who you fight save for the occasional officers, most of which end up as merely EliteMooks at best.
* {{Sarashi}}: [=SW3=] provides this in the form of the female Create a Warrior model who can have half a kimono top and a sarashi.
* SerratedBladeOfPain: Ginchiyo Tachibana. All her weapons are barbed katana with a lightning motif.
* StockNinjaWeaponry: Hanzo wields a Kusarigama in battle. Other ninjas include Kunoichi and Nene (daggers) and Kotaro Fuuma (clawed gauntlets).
* ThemeMusicPowerUp: Tadakatsu, following up [[DynastyWarriors Lu Bu]]'s tradition.
** That specific example aside, it's also common throughout the series for a TriumphantReprise of the game's main theme to kick in when victory is near.
* UnexpectedGameplayChange: Some requests in Survival Mode contain stealth missions. Also, Sugoroku.
** Magoichi occasionally has sniping missions.
** Cannoneering sub-missions in the third game.
* VeryLooselyBasedOnATrueStory: This fluctuates with each game, but it keeps certain points very much intact - namely the deaths of Nobunaga, Mitsuhide, and Hideyoshi are always kept at when they're supposed to be, unless you're playing as them.
* WeaponizedBall: Oichi has her EpicFlail Kendama, Kanbei's {{Energy Ball}}s, and Yoshimoto's Kemari Ball.
* [[WorldOfBadass World Of]] [[WorldOfHam Badass Ham]]: [[DynastyWarriors Par for the course]] for a Koei game.
* YouALLLookFamiliar: There are hundreds of generic NPC officers with nothing but names to differentiate them.
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