[[caption-width-right:350:Come on, where's that I-block...]]
->''I am the man who arranges the blocks that descend upon me from up above''\\
''They come down and I spin them around, 'til they fit in the ground like hand in glove''\\
''Sometimes it seems that to move blocks is fine, and the lines will be formed as they fall''\\
''Then I see that I have misjudged it! I should not have nudged it after all''\\
''Can I have a long one, please?''\\
''Why must these infernal blocks tease?''
-->-- '''[[http://www.youtube.com/watch?v=hWTFG3J1CP8 A Complete History of the Soviet Union as Told by a Humble Worker, Arranged to the Melody of Tetris]]'''
---> by Music/PigWithTheFaceOfABoy

Contrary to popular belief, the Russians did invade during the Cold War -- it just went unnoticed, because they were crafty about it. Their invasion was called ''Tetris'' (Russian: "Тетрис").

The concept is exceedingly simple. Tetriminoes[[note]]Not a typo; The Tetris Company prefers this spelling over the standard "tetromino"[[/note]] (puzzle pieces made from four square blocks) are falling down the screen, and you must arrange them into lines by moving them around your workspace and rotating them. Once you form a line, all blocks in that line vanish, and everything above them falls down one level. You gain more points for making multiple lines at once -- in the standard rules, the maximum number of lines that you can make at once is four, a "Tetris".

As you continue to play, the blocks fall faster and faster. If they reach the top of the play area, the game is over.

According to legend, the game's creator, Alexey Pajitnov, nearly didn't complete the game; he was too addicted to playing the prototype. More on the game's long, weird, complicated history can be found on the [[Analysis/{{Tetris}} Analysis]] page.

First released in 1985, ''Tetris'' products or other programs implementing the same game rules have appeared on nearly every video game console, computer operating system, graphing calculator, mobile phone, and PDA ever released, as well as the lighting systems for a couple of ''buildings'' (its simplicity makes porting it very easy). By far, however, the most famous and popular version was released on the Nintendo UsefulNotes/GameBoy in 1989, bundled with the system upon its release (and becoming its KillerApp at the same time, long before ''Franchise/{{Pokemon}}'' was created). The first of that version's three musical options, a Russian folk song called "[[http://en.wikipedia.org/wiki/Korobeiniki Korobeiniki]]" (although the game just referred to it as "Music A"), has become an [[StandardSnippet iconic]] (and [[EarWorm catchy]]) piece of video game music.

''Tetris'' may well be one of the most beloved video games in the history of the craft, enjoyed by everyone alike. There are few gamers who haven't stared at a screen and muttered, "All I need is one straight line... just ''one''..."

Arika's arcade version of ''Tetris'', called ''VideoGame/TetrisTheGrandMaster'', features a few deceptively simple changes that transform ''Tetris'' from a classic action puzzle game into nothing less than the most cognitively strenuous high-speed twitch game ever devised[[note]]Whisper these words to the Google search box: "TGM Shirase"[[/note]]. But, due to the creator's frustration with clones of that game, [[ScrewedByTheNetwork its future is bleak]].

As you've probably noticed, Tropers/TheAdvertisementServer tends to promote a website called [[http://www.tetrisfriends.com/ Tetris Friends Online Games]]. No, this is not one of those cheap cash-in websites it generally displays (what's with [[Franchise/StarWars Yoda]] wearing makeup, by the way?), it's an actual official Web-based ''Tetris'' game site. [[http://www.marketwire.com/press-release/Tetris-Online-Inc-964607.html No fooling!]]

See also: [[http://www.tetrisconcept.net/wiki/ Tetris Wiki]], TheTetrisEffect.

!!''Tetris'' and its derivatives can contain examples of:

* AllegedlyFreeGame: Along with BribingYourWayToVictory, has become a staple of official Tetris games since around 2007 or so. ''Tetris Online Japan'', ''Tetris Friends'', and ''Tetris Battle'' are all "free" but hide piece previews (except for ''Tetris Friends'') and cripple your controls (in all three games) to slow you down; to remove these handicaps require either paying real money or ''several hundred hours'' of ForcedLevelGrinding.
* AntiFrustrationFeatures: Over time, various features have been added to the tried-and-true formula to streamline the block-stacking experience:
** In the original ''Tetris'' as well as most early ''Tetris'' games by Nintendo, pieces immediately lock once they land on another piece or the floor. The 1988 Sega version of ''Tetris'' introduces what is known as "lock delay"--once a piece lands on something, it has a brief period of time during which it can move around until it finally locks into place. This makes Sega ''Tetris'' playable even at its maximum speed, much less ''TGM'' at instant-drop speed; contrast with Game Boy ''Tetris'' where the game meets its [[KillScreen effective end]] at Level 29 due to blocks being unable to reach the extreme left or right sides before hitting the floor and locking into place immediately.
** In later games, the "ghost piece" feature (or Temporary Landing System as ''TGM'' calls it) was added, showing a "ghost" of the current piece to indicate how the piece will land if it is dropped as is, helping prevent dropping pieces in the wrong column by accident.
** Early games use a very basic random number generator for generating pieces, but even then droughts of a particular piece or two can and will occur. ''TGM'' tweaks the randomizer to bias against dealing out repeats of recent pieces, while modern ''Tetris'' games use randomized permutations of all seven tetrominoes. At worst, you'll go only 13 pieces without an I-piece.
* ArcNumber: Along with BilingualBonus: The name comes from the Greek word "tetra," meaning "four." All tetriminos are made of four blocks, and the line-clearing combo {{cap}} is four.
* TheBackwardsR: Both Atari arcade and Tengen's {{NES}} version spell the title as TETЯIS.
** The Atari version goes even further by substituting Я for the regular R in-game, for example, showing "GAME OVEЯ" when you lose.
* BilingualBonus: With ArcNumber: The name comes from the Greek word "tetra," meaning "four." All tetriminos are made of four blocks, and the line-clearing combo {{cap}} is four.
* BribingYourWayToVictory: Has become a staple of official Tetris games since around 2007 or so. ''Tetris Online Japan'', ''Tetris Friends'', and ''Tetris Battle'' are all "free" but hide piece previews (except for ''Tetris Friends'') and cripple your controls (in all three games) to slow you down; to remove these handicaps require either paying real money or ''several hundred hours'' of ForcedLevelGrinding.
* TheCameo:
** Characters from {{VideoGame/Bomberman}} make an appearance in ''Axis''' Compter Battle mode.
** Nintendo characters appear on the success screen of the NES version's Type-B if cleared on Level 9 or 19. The starting height determines how many appear.
* ColourCodedForYourConvenience: Most games give each piece its own color; these were standardized across games in the 2000s. See RainbowMotif below.
* ComebackMechanic: One item in ''Tetris Axis'' switches your playing field with that of the opponent. This is most often used to transfer what should be an inevitable loss to your opponent.
* TheComputerIsACheatingBastard: Averted. Early players complained that the computer was cheating and refusing to drop the one piece they needed. Pajitnov added the "Statistics" bars at the side of the screen to prove that the game was fair over the long term. In more recent versions, the [[http://harddrop.com/wiki/Random_Generator Random Generator]] deals all pieces seven at a time and is guaranteed to generate an equal number of each piece.
** On the other hand, there's ''[[http://fph.altervista.org/prog/bastet.html Bastet]]'', a "Bastard Tetris" that ''does'' specifically deny you the pieces you want.
** UpToEleven: ''VideoGame/WesleyanTetris'' will give you an absurdly shaped piece, then shuffle the landscape while you're trying to place it. It will lie about the next piece just seldom enough that you can't afford to ignore it. It will place an InvisibleBlock right where you were about to clear a line, and greet your failure with a {{Rimshot}}. Welcome to Tetris PlatformHell.
* CouchGag: ''Puyo Puyo Tetris'' has a random character perform the SEGA Choir, as well as saying "Tetris", every time the game is started up.
* {{Crossover}}: With ''VideoGame/PuyoPuyo'' for ''Puyo Puyo Tetris''.
** There's also ''Magical Tetris Challenge'', which stars WesternAnimation/MickeyMouse and friends, as well as ''Tetris With Anime/CardcaptorSakura: Eternal Heart'', both of which are Licensed games based on the Tetris brand.
* DifficultyByAcceleration
* DisneyOwnsThisTrope: The Tetris Company claims trademark on tetrominos themselves (the shapes made with 4 square blocks) when applied to games.
** While the Korobeiniki song is public domain, the Tetris Company's specific arrangement of the song for the games is trademarked.
* DummiedOut: The NES version has an unfinished [[http://www.youtube.com/watch?v=qKX10r3qMLE co-op mode]].
* EndlessGame: Many Tetris ports come with several modes, one of which (usually "Type A") is this (the others are aversions requiring you to clear a specific number of lines).
* FakeDifficulty: If you're migrating from a newer version to an older version, the latter becomes a retroactive example. Usually, you have no lock delay, let alone infinite spin, and stiffer controls. See also the aforementioned ''Bastet''.
** Also, the video iPod version has notoriously touchy controls. The slightest movement as the piece is about to drop will move it out of place (or rotate it, depending on your game settings).
** Original version was optimized for the UsefulNotes/{{Elektronika60}} mini, but these were big and expensive, so mostly it was run on smaller and cheaper DVK [=PCs=]. These were quite a bit slower, though, and with unpatched E60 binaries the controls were notoriously unresponsive.
* FanRemake: [[http://en.wikipedia.org/wiki/List_of_Tetris_variants Numerous ports]] of Tetris have been made over the years, including a handful of fan-made ones.
* FilkSong: Music/BrentalFloss' ''Tetris '''with lyrics!''''' and ''Tetris Suicide''.
* FollowTheLeader: ''Tetris'' has innumerable clones, knockoffs, and imitators.
* {{Intermission}}:
** The Atari arcade game featured a dancer after clearing every third round. Push the rotation button to [[VaudevilleHook give him the hook]].
** In Tengen's version, several dancers can appear based on the number of Triples and Tetrises cleared during a level. They take a bow either after completing the act or if you wish not to see it.
* JackOfAllStats: The T block. Because it has the most sides out of all the other pieces, and it's the only one able to [[http://tetris.wikia.com/wiki/T-Spin T-Spin]], you can practically put it anywhere on the board, granted there's an open space.
* KillScreen: Nintendo's NES and Game Boy versions become virtually impossible to continue starting at Level 29, due to pieces falling so fast that they can't move to the left or right edges of the playfield anymore. Versions based on SEGA's 1989 ''Tetris'' game, as well as current ''Tetris'' games with endless modes, largely avert this due to allowing pieces to be moved for a brief period after landing on something.
* KonamiCode: In Tengen's NES version, inputting the code while the game is paused replaces your current piece with a straight piece as seen in [[http://www.youtube.com/watch?v=FjaRPjgVLU0 this video]]. It only works once per 30-line section.
* MechanicalLifeforms: The Minos in ''Tetris Worlds''.
* MultipleEndings: ''Tetris DX'''s endings feature attempts at launching something into space. If you play well enough a rocket is launched successfully.
* NearVictoryFanfare: ''Tetris DS'' has its Push Mode based on ''VideoGame/DonkeyKong''. As you come closer to victory, the 25m music gains an upbeat drum beat, adds a melody, and then becomes the hammer theme from the same game. The [[SongsInTheKeyOfPanic reverse]] also occurs if you're on the losing side.
** Also, in Marathon Mode of ''Tetris DS'', while the previous four levels play a "Hurry Up!" for their melody, the final level (Level 20) changes the music one last time into [[CrowningMusicOfAwesome an awesome remix of the classic Tetris music.]]
* NonIndicativeName: The "[[http://harddrop.com/wiki/Random_Generator Random Generator]]" used to deal out pieces in later iterations is, in fact, very restrictive and predictable.
* NoPlotNoProblem: Most iterations of the game.
** ExcusePlot: ''[[https://www.youtube.com/watch?v=30b7jLZjp6w Tetris Worlds]]''.
*** ''Tetris Plus'' involved trying to clear the floor so that a gem-hunting archeologist could get to the exit and treasures at the bottom before the slowly descending spikes reached his head. That's it.
* NostalgiaFilter + ComplainingAboutPeopleNotLikingTheShow: Some people will look at you funny if you don't think the NES and GameBoy versions are the best ''Tetris'' games of all time.
* ObviousBeta: Creator/{{Ubisoft}}'s version of ''Tetris Ultimate'' on the UsefulNotes/Playstation4 and UsefulNotes/XboxOne is notious for having lag issues, as well as crashing entirely.
* OneWordTitle: A BilingualBonus: The name comes from the Greek word "tetra," meaning "four." All tetriminos are made of four blocks, and the line-clearing combo {{cap}} is four.
* PublicDomainSoundtrack: The NES version used Music/{{Pyotr Ilyich Tchaikovsky}}'s "[[http://www.youtube.com/watch?v=G0YLjccRPZg Dance of the Sugar Plum Fairy]]", while the Game Boy and most later versions are known for the Russian folk song "[[http://www.youtube.com/watch?v=NmCCQxVBfyM Korobeiniki]]".
** A specific arrangement of ''Korobeiniki'' is a [[http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=77037539 trademark of The Tetris Company]]. You have been warned!
** Music C in the GameBoy version is an arrangement of Music/{{Johann Sebastian Bach}}'s French Suite No. 3 In B Minor, BWV 814, IV. Menuett Trio. In the game, the song actually plays in F sharp minor.
* PublicMediumIgnorance: Some people think all versions of ''Tetris'' play exactly the same, and as such cry "Fake!" whenever they see a TGM video.
* RainbowMotif:
** The current color setup for the Tetriminoes follows this, except with violet replaced with cyan. For the curious, these are red for Z, orange for L, yellow for O, green for S, cyan for I, blue for J, and purple for T.
** SEGA's, Jaleco's, and Arika's ''Tetris'' games instead use red for I, cyan for T, and purple for Z.
* RankInflation: Present in ''Super Tetris 3'', ''Tetris Worlds'', and possibly others.
* {{Sampling}}: ''The New Tetris'' for the UsefulNotes/Nintendo64 has an impressive amount of this for a cart-based game. The soundtrack samples everything from vocals, to drum breaks, to chords, and even to melodies.
* SongsInTheKeyOfPanic: In most games, the music speeds up if the stack gets too close to the top of the screen.
* SpellMyNameWithAnS: What mathematicians spell "tetromino" the Tetris Guideline spells "tetrimino".
* StalkedByTheBell: Fail to complete an objective in Tetris DS's "Mission" mode, and your playfield gets bumped up by four lines of blocks before your next objective is given.
* StuffBlowingUp: The {{spinoff}} ''[=BomBliss=]''.
* TheTetrisEffect: The TropeNamer.
* UpdatedReRelease: "Tetris & Dr. Mario" for SNES, both of which are based on the Game Boy versions of their respective games, which featured remixed graphics and sound, plus an exclusive "Mixed Match" mode.
* UpToEleven: One of the numerous spinoff games out there is called "VideoGame/NotTetris", which ramps things up by adding a PhysicsEngine into the game. Even if you do manage to properly align a Tetrimino, it'll bounce around before it settles.
** I present to you [[http://www.swfme.com/view/1046212 Hell]], which was inspired by the [[http://xkcd.com/724/ xkcd comic of the same name]], and which features a "U" shaped bottom. It is genuinely playable, but enjoy your hell.
*** There's also Ntris, which is a tetris game that can make pieces with any number of squares. It does not seem to be ridiculous until you are faced with six and seven square pieces that just do not quite fit.
** [[http://firstpersontetris.com/ First-Person Tetris]]. If you're prone to motion sickness, beware.
** [[http://ngworks.net/game/tetoris.html Full HD Tetris]]. This is actually the second of three versions of Full HD Tetris made by this person and is by far the most insane - the playfield is so large that even ''committing suicide'' takes ages.
* VideoGame3DLeap: ''Welltris'', also created by Alexey Pajitnov. Notable that it did it without UsefulNotes/PolygonalGraphics.
** The slightly obscure ''VideoGame/{{Tetrisphere}}'' also was this, and is a surprisingly good game, though gameplay admittedly matches up little with conventional ''Tetris''. It's about [[MatchThreeGame quickly matching same-shaped pieces to form chains]], and some of those pieces are made with three blocks instead of four.
** The even more obscure UsefulNotes/VirtualBoy game ''3D Tetris'', which was also a surprisingly good game. Featured genuinely challenging puzzle modes along with the "normal" play.
** Another game similar to ''Welltris'' and also released in 1989 was ''Blockout'' by California Dreams. [[http://blockout.net/ An open-source version]] for modern systems is still actively maintained.
* ViolationOfCommonSense: Many modern games actually reward more points for comboing single line clears than making Tetrises.