History MilestoneCelebration / VideoGames

** For the twentieth anniversary of the release of ''VideoGame/BionicCommando'' (1988), a 2.5-D remake of the original was released in 2008, with a fully 3-D sequel following in early 2009.

* Creator/EpicGames celebrated 20 years of the ''VideoGame/{{Unreal}}'' series in May 2018 by giving [[VideoGame/UnrealI the original game]] away for free on Website/GogDotCom and Platform/{{Steam}} over a period of 48 hours.

%%This page has been alphabetized. Please put new entries in their proper places. Thanks!

[-[[caption-width-right:350:Thirty years of adventures under his belt and yet, [[NotAllowedToGrowUp he's still fifteen]].]]-]

* ''VideoGame/DoubleDragon'': Both ''VideoGame/DoubleDragonNeon'' and ''VideoGame/AbobosBigAdventure'' were released in 2012, coinciding with the franchise's 25th. Both are [[AffectionateParody wacky parodies]] of the [[TropeCodifier seminal]] beat'em up as well as [[TheEighties 80s]] culture in general; ''Neon'' takes on 80's music and fashion, while ''Abobo'' spoofs the [[UsefulNotes/NintendoEntertainmentSystem NES]] library in particular (it's also a lot [[BloodyHilarious gorier]]...).

* According to WordOfGod, the release of ''VideoGame/EarthBoundBeginnings'' on UsefulNotes/VirtualConsole is meant to celebrate ''VideoGame/{{EarthBound|1994}}''[='=]s 20th anniversary.

* ''VideoGame/HalfLife1'' came out in November 1998. In November 2008, Valve offered the game to anyone who still didn't own it on UsefulNotes/{{Steam}} for 98 cents.

** ''VideoGame/HaloInfinite'' was released close to the 20th anniversary of ''Combat Evolved'', and thus the 20th anniversary of the original UsefulNotes/{{Xbox}}. Also for this milestone, ''[[CompilationReRelease The Master Chief Collection]]'' received several new cosmetics for your Spartan, most of which are themed after the original Xbox, in addition to two new armor sets: SPI (a highly-requested armor set which first appeared in ''Literature/HaloGhostsOfOnyx'' and became a staple of the ''Halo'' ExpandedUniverse despite never being seen in the games until now) and Orion (based on the pre-release MJOLNIR design from the 1999 Macworld demo).

* In 1995, Creator/HudsonSoft celebrated the tenth anniversary of their ''All-Japan Caravan Festival'' with ''Caravan Shooting Collection'', a CompilationRerelease of the games featured in the first three years of the festival (''VideoGame/StarForce'', ''VideoGame/StarSoldier'', and ''[[VideoGame/StarshipHector Hector '87]]'') for the [[UsefulNotes/SuperNintendoEntertainmentSystem Super Famicom]]. All three games are presented in their original [[UsefulNotes/NintendoEntertainmentSystem Family Computer]] aesthetics.

** The series celebrated its 25th year with four games in 2011: ''[[VideoGame/TheLegendOfZeldaSkywardSword Skyward Sword]]'', remakes of ''[[VideoGame/TheLegendOfZeldaOcarinaOfTime Ocarina of Time]]'' and ''[[VideoGame/TheLegendOfZeldaFourSwords Four Swords]]'', and a rerelease of ''[[VideoGame/TheLegendOfZeldaLinksAwakening Link's Awakening]]'' that helped launch the UsefulNotes/Nintendo3DS's Virtual Console service. Plus a worldwide orchestral concert tour, [[PreOrderBonus promotional items]] for ''Skyward Sword'' and ''Ocarina'', and a tribute level (5-2) in ''VideoGame/SuperMario3DLand''. The anniversary concluded with the art book ''Literature/HyruleHistoria'', which revealed the complete timeline of the franchise for the first time ever. ''Skyward Sword'' itself would be revisited for the 35th anniversary by receiving an HD port to the UsefulNotes/NintendoSwitch in 2021, complete with new controls that permit the use of the analog stick to replicate the motion controls of the Wii game (the motion controls are also possible by using the Joycons in the same fashion).

** Unlike the last two anniversaries, the 35th Anniversary of the series in 2021 was not celebrated with much fanfare from Nintendo, with them outright admitting to have no major plans for the anniversary during E3 2021 (disappointing many in the process). That said, they still celebrated it in a more low key fashion. In addition to an UpdatedRerelease of ''VideoGame/TheLegendOfZeldaSkywardSword'' in July, a UsefulNotes/GameAndWatch-style handheld was created in a similar vein to the one made for Mario's anniversary with the original ''VideoGame/TheLegendOfZeldaI'', ''VideoGame/ZeldaIITheAdventureOfLink'', ''VideoGame/TheLegendOfZeldaLinksAwakening'', and a variant of the classic [=G&W=] game "Vermin".

* In November 2014, Sony celebrated the 20th anniversary of the Japanese launch of the first Playstation by releasing a LimitedSpecialCollectorsUltimateEdition UsefulNotes/PlayStation4 featuring a color scheme similar to the original console. It was produced in ''extremely'' limited quantities.

*** Two new games were released, ''VideoGame/PokemonGo'' for mobile and ''VideoGame/PokkenTournament'' for the UsefulNotes/WiiU.

** For the 25th anniversary, ''Pokémon Brilliant Diamond and Shining Pearl'', remakes of ''VideoGame/PokemonDiamondAndPearl'' for the UsefulNotes/NintendoSwitch were announced for a late 2021 release. Also announced for a 2022 release is ''VideoGame/PokemonLegendsArceus'', a seemingly WideOpenSandbox take on the series set in a feudal-era Sinnoh.

** For the 25th Anniversary, Sega released ''VideoGame/PuyoPuyoChronicle'', which again has lots of modes to play, but more notably, is the second time in the series after ''Puyo Puyo DA!'' to go [[VideoGame3DLeap full 3D]] with a chibi artstyle. It also introduced an RPG mode with the Skill Battle ruleset being the main focus. Despite the last anniversary games being multiplatform, ''Chronicle'' is [[UsefulNotes/Nintendo3DS Nintendo 3DS]] exclusive.
** While ''Puyo Puyo Champions'' is not an anniversary game in the same way as its predecessors, its Japanese release date was on October 25, 2018, which is the 27th anniversary of ''Puyo Puyo'' for the UsefulNotes/MSX2 and [[UsefulNotes/NintendoEntertainmentSystem Famicom Disk System]].

* In celebration of their 40th anniversary, SNK released ''SNK 40th Anniversary Collection'', a compilation title of the company's earliest games, including (but not limited to) ''VideoGame/{{Crystalis}}'', ''VideoGame/IkariWarriors'', and ''VideoGame/PsychoSoldier''. They also released the UsefulNotes/NeoGeo Mini, a plug-and-play console designed after the Neo Geo arcade cabinets of the [=1990s=] and containing forty different games.

** For the 25th Anniversary in 2010, Nintendo set up [[http://www.nintendo.co.jp/mario25th/ two]] [[http://mario25th.nintendo.com/ websites]] and rereleased the SNES game ''VideoGame/SuperMarioAllStars'' for the UsefulNotes/{{Wii}} with a book and soundtrack.

** The 15th anniversary was ''VideoGame/{{Super Robot Wars Original Generation}}s'', compiling both ''Original Generation'' titles from the Creator/{{Nintendo}} UsefulNotes/GameBoyAdvance into a single game, effectively [[ContinuityReboot rebooting]] the sub-series.

* Creator/EpicGames celebrated 20 years of the ''VideoGame/{{Unreal}}'' series in May 2018 by giving [[VideoGame/UnrealI the original game]] away for free on Website/GogDotCom and UsefulNotes/{{Steam}} over a period of 48 hours.

* The ''VideoGame/WorldOfMana'' series celebrated its 25th anniversary with a mobile and UsefulNotes/PlayStationVita remake of the first game, ''VideoGame/FinalFantasyAdventure'' (which was called ''Seiken Densetsu: Final Fantasy Gaiden'' [[MarketBasedTitle in Japan]]; the series separated from ''Franchise/FinalFantasy'' with ''VideoGame/SecretOfMana'' worldwide rather than this being a true case of DolledUpInstallment), with the remake being renamed ''Adventures of Mana'' internationally.

* ''VideoGame/{{Yakuza}}'', otherwise known as ''Ryu Ga Gotoku'' in its native Japan, celebrated the series' tenth anniversary with two games. One was ''VideoGame/Yakuza0'', a prequel that dove into the backstory of the game's characters and settings, in addition to making BreakoutCharacter Goro Majima [[PromotedToPlayable playable for the first time in a main-series game]].[[note]]Majima was previously playable in the non-canon spinoff ''VideoGame/YakuzaDeadSouls''.[[/note]] The other was a remake of the first game, ''Yakuza Kiwami''. Not only were new features and content from ''0'' implemented into the game, but it also introduced a new mechanic based entirely around Majima, and the story was also expanded to explore [[EvilFormerFriend Akira Nishikiyama's]] descent into villainy.

* ''VideoGame/DoubleDragon'': Both ''VideoGame/DoubleDragonNeon'' and ''VideoGame/AbobosBigAdventure'' were released in 2012, coinciding with the franchise's 25th. Both are [[AffectionateParody wacky parodies]] of the [[TropeCodifier seminal]] beat'em up, though ''Abobo'' goes further by spoofing the [[UsefulNotes/NintendoEntertainmentSystem NES]] library as a whole. It's also a lot [[BloodyHilarious gorier]].

* ''VideoGame/RuneScape'' celebrated its 100th quest with a continuation of the first one, divided in several segments with their own rewards. It was basically the biggest quest until that point.

* ''VideoGame/{{Shadowverse}}'': For every 1 million downloads, Cygames gives away X free packs of the latest expansion equivalent to the X million times the game has been downloaded. There are also Anniversary events commemorating years of the game, which give free packs from all expansions to the players, as well as the Polls which allow the player to vote which among the characters should be featured as the next leaders.
* ''Franchise/FinalFantasy'':
** Creator/SquareEnix had a group of games released under the 20th Anniversary banner of the series, including a PSP UpdatedRerelease of the original and the MassiveMultiplayerCrossover ''VideoGame/DissidiaFinalFantasy''.
** At the same time, the latest part of the Compilation, ''VideoGame/CrisisCore: VideoGame/FinalFantasyVII'', was promoted as part of the 10th anniversary of ''Final Fantasy VII''.
** ''VideoGame/TheatrhythmFinalFantasy'' was released to coincide with the franchise's 25th anniversary.

* ''Franchise/SonicTheHedgehog'' has gone through several, starting in 2001:
** The tenth anniversary was celebrated with ''VideoGame/SonicAdventure2'', which saw the release of a "Birthday Pack", which included the game, a commemorative coin, a soundtrack CD, a booklet on the history of the franchise, and a special binding to hold them together. Later that same year, ''Sonic Adventure 2: Battle'' (an upgraded version of Sonic Adventure 2) and ''VideoGame/{{Sonic Advance|Trilogy}}'' were both released in Japan before hitting elsewhere a year later.
** The fifteenth, in 2006, with ''VideoGame/SonicRiders'', ''VideoGame/SonicTheHedgehog1 [[UpdatedReRelease Genesis]]'' and ''VideoGame/SonicTheHedgehog2006''.
** The 20th anniversary game (2011), ''VideoGame/SonicGenerations'', builds off the successes of ''VideoGame/SonicColors'' and ''VideoGame/SonicTheHedgehog4'' one year prior. Its biggest selling point is [[MeetYourEarlyInstallmentWeirdness the return of the classic]], black-eyed Sonic, running alongside the modern, green eyed one, each with their respective, seperate gameplay in a time travel plot that revisits areas from the preceding nine main games of the series. [[LampshadeHanging The plot is even based on a time-altering villain crashing Sonic's birthday party.]]\\
\\
It's not just the hedgehog celebrating his 20th birthday --- the Music/{{Vocaloid}}s get in the act in a minor way, as the third title of Sega's ''Project Diva'' series of Vocaloid {{Licensed Game}}s, released just a few days after ''Generations'', includes a Vocaloid cover of "[[VideoGame/SonicAdventure2 Live & Learn]]" in the [[{{Feelies}} bundled]] bonus CD and an in-game Sonic costume for Miku '''because''' of ''Generations'' (in contrast the other Sega-themed costumes in the series[[note]]culled from ''VideoGame/SpaceChannel5'', ''VideoGame/ValkyriaChronicles'', ''VideoGame/VirtuaFighter'' and ''VideoGame/VirtualOn''[[/note]] were included merely for the sake of {{Shout Out}}s).
** ''VideoGame/SonicMania'' and ''VideoGame/SonicForces'' were both made for the 25th anniversary. The former is a {{Retraux}} 2D platformer headed by several {{Promoted Fanboy}}s, while the latter brought back Classic Sonic again for a CrisisCrossover. Perhaps thanks to lessons learned after ''Sonic 2006'', both games were released the following year (2016 marks 25 years since the release of ''Sonic the Hedgehog''). ''Sonic Mania'' in particular launched with a celebratory limited edition physical release that includes a code to download the game, a statue of Sonic standing on a Genesis that plays the "SEGAAAA" fanfare, and a gold ring inside of a replica Sega Genesis cart.
** Sonic's 30th Anniversary was a bit more low key compared to the previous anniversaries due to the ongoing UsefulNotes/COVID19Pandemic affecting plans, but Sega still celebrated the occasion in a big way. The occasion was celebrated by the release of ''Sonic Colors Ultimate'' (a remastered port of ''VideoGame/SonicColors''), the first unveilings of ''Sonic Origins'' (a CompilationRerelease featuring remasters of the first four classic games) and ''VideoGame/SonicFrontiers'', a 30th anniversary themed-symphony, and the release of the ''Sonic the Hedgehog Encyclo-speed-ia'', (a comprehensive encyclopedia on the history of the main series titles written by long-time ''Sonic'' comic writer Creator/IanFlynn). In addition, an official DLC pack for ''VideoGame/{{Minecraft}}'' was developed and released by Gamemode One, numerous collaborations occurred with various Sega games and [[https://twitter.com/SonicOfficialJP/status/1408062951769010180 Sonic himself became a]] VirtualYouTuber. IDW would also release several [[Recap/SonicTheHedgehogIDW30thAnniversarySpecial Classic Sonic]]-[[Recap/SonicTheHedgehogIDW30thAnniversaryFCBD2021 themed comics for the occasion]].
** 2023 appears to be the year of Amy Rose, who made her debut in 1993's ''VideoGame/SonicCD''. The spinoff VisualNovel ''VisualNovel/TheMurderOfSonicTheHedgehog'' is set during Amy's birthday, ''Sonic Origins'' received the Plus Expansion Pack that has Amy PromotedToPlayable among other additions, and ''VideoGame/SonicSuperstars'' has Amy adventuring alongside Sonic, Tails, and Knuckles.
* ''Franchise/{{Castlevania}}'':
** ''VideoGame/CastlevaniaPortraitOfRuin'' was released in 2006, 20 years after the release of 1986's ''[[VideoGame/CastlevaniaI Akumajo Dracula]]'' for the Famicom Disk System in Japan. The game includes plenty of references to series history and pre-order bonuses included an artbook, timeline, and soundtrack [=CD=], all of which containing art/information/music spanning the entire series.
** ''VideoGame/CastlevaniaTheAdventureReBirth'' was released for [=WiiWare=] in Japan exactly twenty years after [[VideoGame/CastlevaniaTheAdventure the original Game Boy game's]] release.
* ''Franchise/SuperMarioBros'':
** The franchise celebrated its anniversary [[note]]that is, of ''VideoGame/SuperMarioBros1'', not of Mario's real debut in ''VideoGame/DonkeyKong''[[/note]] with "[[GratuitousEnglish Happy! Mario 20th]]". They had a website (now defunct) and a soundtrack (with selections from the original game, ''VideoGame/SuperMarioBrosTheLostLevels'', ''VideoGame/SuperMarioBros3'', ''VideoGame/SuperMario64'', and ''VideoGame/SuperMarioSunshine'') to celebrate with it, and they even offered a [[https://media.sonicscanf.org//gallery/sonic-the-hedgehog/Mario%2020th.png "20th Happy Mario!"]] ''Franchise/{{Sonic|TheHedgehog}}'' shirt!
** For the 25th Anniversary in 2010, Nintendo set up [[http://www.nintendo.co.jp/mario25th/ two]] [[http://mario25th.nintendo.com/ websites]] and rereleased the SNES game ''VideoGame/SuperMarioAllStars'' for the UsefulNotes/{{Wii}} with a book and soundtrack.
** Nintendo also celebrated the 30th anniversary of Luigi's first appearance in ''VideoGame/MarioBros'', calling the year 2013 "Advertising/TheYearOfLuigi" in order to celebrate the release of three Luigi-centered games (''VideoGame/LuigisMansionDarkMoon'', ''[[VideoGame/DrMario Dr. Luigi]]'', and ''VideoGame/MarioAndLuigiDreamTeam''), as well as the ''VideoGame/NewSuperLuigiU'' ExpansionPack for ''VideoGame/NewSuperMarioBrosU'' and a Luigi-centric version of ''VideoGame/MarioBros'' unlockable in ''VideoGame/SuperMario3DWorld''.
** The 30th anniversary of ''Franchise/SuperMarioBros'' was celebrated with the release of ''VideoGame/SuperMarioMaker'', a GameMaker allowing players to create 2D Mario levels of their own including art styles based on ''VideoGame/SuperMarioBros1'', ''VideoGame/SuperMarioBros3'', ''VideoGame/SuperMarioWorld'', and ''VideoGame/NewSuperMarioBrosU''. The game was released on September 11th, 2015, the Friday before the exact birthday of the franchise (''VideoGame/SuperMarioBros1'' was released in Japan in September 13th, 1985). Website/{{Google}} also celebrated the anniversary by adding a question mark box straight from the first 8-bit title (which even gives you a coin when you click it, and an extra life if you click it 100 times) when you search for "Super Mario Bros.".
** ''Super Mario Maker'' itself celebrated the 25th anniversary of ''Manga/SuperMarioBrosMangaMania'' by having an Event Course based on it available. Completing it unlocks a costume based on Mario-kun.
** The 35th anniversary of the franchise was honored with, among other things, ''Super Mario 3D All-Stars'', an UpdatedRerelease [[CompilationRerelease collection]] of ''VideoGame/SuperMario64'', ''VideoGame/SuperMarioSunshine'' and ''VideoGame/SuperMarioGalaxy''; ''VideoGame/SuperMario3DWorld + VideoGame/BowsersFury''; the augmented reality game ''VideoGame/MarioKart Live: Home Circuit''; a special Game and Watch unit containing the first game, ''The Lost Levels'' and a Mario-themed variant of the ''Ball'' game; a 35th Anniversary Ninji Speedrun in ''VideoGame/SuperMarioMaker2''; ''VideoGame/SuperMarioBros35'', an online competitive version of ''Super Mario Bros.''; and various licensed product deals.
* ''VideoGame/SuperMonkeyBall'':
** The franchise celebrated its 10th anniversary with the release of ''Super Monkey Ball [=3D=]'', Sega also opened up an anniversary website for the franchise at that time.
** In time for the franchise's 20th anniversary, Sega released ''Super Monkey Ball Banana Mania'', an enhanced remake of the franchise's first three games with new features. Sonic's official social media accounts [[https://twitter.com/sonic_hedgehog/status/1408151166345641985 also got in on a bit of the fun]].
* ''VideoGame/SpaceInvaders'' celebrated their 30th anniversary with ''Space Invaders Get Even'', where the eponymous invaders become {{Villain Protagonist}}s. They also released ''Space Invaders Extreme'', which is a modern revamping of the game.
* ''VideoGame/TheKingOfFighters XII'' was rushed to market to mark the series' 15th anniversary. As ''VideoGame/SonicTheHedgehog2006''[='s=] equal circumstances had already demonstrated, results were disappointing.

* The ''VideoGame/{{SaGa|RPG}}'' series celebrated its 20th anniversary by remaking ''VideoGame/FinalFantasyLegendII'' as ''[=SaGa 2 Hihou Densetsu -Goddess of Destiny-=]''...and releasing a [[ArchivePanic 20-disc compilation]] of all the ''[=SaGa=]'' soundtracks.
* ''VideoGame/PacMan'':
** ''VideoGame/PacManWorld'' was released for the 20th anniversary of the original ''Pac-Man'' -- the plot is even based on [[ABirthdayNotABreak a villain crashing Pac-Man's birthday party]]. ''Pac-Man World 3'' would later be released for his 25th anniversary and likewise features Pac-Man celebrating his 25th birthday, even pointing out "At least this birthday is better than my 20th!"
** Website/{{Google}} celebrated ''Pac-Man''[='=]s 30th Anniversary by putting a [[http://www.google.com/pacman playable Pac-Man game on the Google main page]], where they usually just put picture links (Only ''Series/DoctorWho''[='=]s 50th would also get this same honor). Creator/BandaiNamcoEntertainment, for their part, announced ''WesternAnimation/PacManAndTheGhostlyAdventures'' during this period (it premiered three years later) and released the new arcade game ''[[https://www.youtube.com/watch?v=fVLOYkLje2Q Pac-Man Battle Royale]]''. [[ArsonMurderAndJayWalking And a Wii party game]], which introduced several character redesigns that would be ultimately finalized by ''Ghostly Adventures''.
** The 35th anniversary was celebrated with the mobile game ''Pac-Man 256'', by the developers of ''VideoGame/CrossyRoad'', while the 40th was celebrated with battle royale-style games called ''Pac-Man Mega Tunnel Battle'' and ''VideoGame/PacMan99'' (among others).
* ''Franchise/{{Halo}}'':
** The [[VideoGame/HaloCombatEvolved first game]] got a graphically revamped UpdatedRerelease with bonus story content and a ''VideoGame/HaloReach'' NostalgiaLevel map pack (which could also be obtained as a seperate {{DLC}}) for its tenth anniversary. The rerelease was one of the first games developed by 343 Industries, the ''Halo'' studio established after Creator/{{Bungie}} became an indie studio.
** They did it again for the ten year anniversary of the [[VideoGame/Halo2 second game]], not just by graphically revamping ''Halo 2'' and adding further story content, but by compiling together the most recent versions of the first four numbered entries (including the before-mentioned H1 and H2 rereleases) into ''Halo: The Master Chief Collection'', which includes support for all four multiplayers (including every map ever released), the digital feature ''Halo: Nightfall'', and access to the ''VideoGame/Halo5Guardians'' multiplayer beta.
** ''VideoGame/HaloInfinite'' was released close to the 20th anniversary of ''Combat Evolved'', and thus the 20th anniversary of the original UsefulNotes/{{Xbox}}. Also for this milestone, ''[[CompilationReRelease The Master Chief Collection]]'' received several new cosmetics for your Spartan, most of which are themed after the original Xbox, in addition to two new armor sets: SPI (a highly-requested armor set which first appeared in ''Literature/HaloGhostsOfOnyx'' and became a staple of the ''Halo'' ExpandedUniverse despite never being seen in the games until now) and Orion (based on the pre-release MJOLNIR design from the 1999 Macworld demo).
* ''Franchise/TheLegendOfZelda'':
** The series celebrated its 25th year with four games in 2011: ''[[VideoGame/TheLegendOfZeldaSkywardSword Skyward Sword]]'', remakes of ''[[VideoGame/TheLegendOfZeldaOcarinaOfTime Ocarina of Time]]'' and ''[[VideoGame/TheLegendOfZeldaFourSwords Four Swords]]'', and a rerelease of ''[[VideoGame/TheLegendOfZeldaLinksAwakening Link's Awakening]]'' that helped launch the UsefulNotes/Nintendo3DS's Virtual Console service. Plus a worldwide orchestral concert tour, [[PreOrderBonus promotional items]] for ''Skyward Sword'' and ''Ocarina'', and a tribute level (5-2) in ''VideoGame/SuperMario3DLand''. The anniversary concluded with the art book ''Literature/HyruleHistoria'', which revealed the complete timeline of the franchise for the first time ever. ''Skyward Sword'' itself would be revisited for the 35th anniversary by receiving an HD port to the UsefulNotes/NintendoSwitch in 2021, complete with new controls that permit the use of the analog stick to replicate the motion controls of the Wii game (the motion controls are also possible by using the Joycons in the same fashion).
** The series' 30th Anniversary five years later was more subdued, but nevertheless active. Nintendo first released an UpdatedRerelease of ''VideoGame/TheLegendOfZeldaTwilightPrincess'' in March of 2016. They also unveiled the long-awaited ''VideoGame/TheLegendOfZeldaBreathOfTheWild'' at E3 2016 though that didn't end up releasing until the following year.
** Unlike the last two anniversaries, the 35th Anniversary of the series in 2021 was not celebrated with much fanfare from Nintendo, with them outright admitting to have no major plans for the anniversary during E3 2021 (disappointing many in the process). That said, they still celebrated it in a more low key fashion. In addition to an UpdatedRerelease of ''VideoGame/TheLegendOfZeldaSkywardSword'' in July, a UsefulNotes/GameAndWatch-style handheld was created in a similar vein to the one made for Mario's anniversary with the original ''VideoGame/TheLegendOfZeldaI'', ''VideoGame/ZeldaIITheAdventureOfLink'', ''VideoGame/TheLegendOfZeldaLinksAwakening'', and a variant of the classic [=G&W=] game "Vermin".
* ''VideoGame/SolatoroboRedTheHunter'' is considered to be Creator/CyberConnect2's 15th anniversary celebration, being a SpiritualSequel to [[VideoGame/TailConcerto the very first game they developed]]. Likewise, ''VideoGame/FugaMelodiesOfSteel'' is treated as their 25th anniversary celebration.

* Parodied in ''VideoGame/TeamFortress2'': Valve meant to commemorate their 100th update with the medals that showed how long it was since you first started playing the game, but they had to put a bunch of other, minor updates before then. So when it finally came out, it was the 119th update, and they acted as if this was some major milestone to celebrate. It's also worth noting that the 300th update was a fairly major update that came with the release of Meet the Pyro, the last Meet the Team video.
* ''VideoGame/HalfLife1'' came out in November 1998. In November 2008, Valve offered the game to anyone who still didn't own it on {{UsefulNotes/Steam}} for 98 cents.

* ''VideoGame/TheSims3'': High-End Loft Stuff. Since it was released around the time of The Sims franchise's 10th anniversary, 3 items from the original game were included in the pack: the giant fish tank, the electric guitar, [[BreadEggsMilkSquick and the vibrating love bed]].
* ''VideoGame/RatchetAndClankFullFrontalAssault'' was released to commemorate the duo's 10th anniversary.
* In celebration of their 40th anniversary, SNK released ''SNK 40th Anniversary Collection'', a compilation title of the company's earliest games, including (but not limited to) ''VideoGame/{{Crystalis}}'', ''VideoGame/IkariWarriors'', and ''VideoGame/PsychoSoldier''. They also released the UsefulNotes/NeoGeo Mini, a plug-and-play console designed after the Neo Geo arcade cabinets of the [=1990s=] and containing forty different games.
* The ''VideoGame/SuperRobotWars'' franchise often releases a new installment for every fifth year since its inception:
** The 15th anniversary was ''VideoGame/{{Super Robot Wars Original Generation}}s'', compiling both ''Original Generation'' titles from the Creator/{{Nintendo}} UsefulNotes/GameBoyAdvance into a single game, effectively [[ContinuityReboot rebooting]] the sub-series.
** The 20th anniversary was the ''[[VideoGame/SuperRobotWarsZ Second Super Robot Wars Z: Hakai-hen'']]
** The 25th anniversary was the ''Original Generation'' sequel ''The Moon Dwellers'', which had the honor of being released ''in English'' for non-Japanese regions.
** The 30th anniversary game will be the aptly named ''VideoGame/SuperRobotWars30'', which will have the honor of actually being the first game is the series with licensed characters to be released in North America and Europe.

* ''VideoGame/Drakengard3'' was meant as this for the ''VideoGame/{{Drakengard}}'' series, marking its 10th anniversary.
* ''VideoGame/PuyoPuyo'':
** For the 15th anniversary, Sega released ''VideoGame/PuyoPuyo15thAnniversary'', which brought back older characters that had been missing in the ''Fever'' games. Also has a multitude of modes and story routes to play.
** For the 20th anniversary, Sega released ''VideoGame/PuyoPuyo20thAnniversary'', which invited characters that debuted or returned from ''VideoGame/PuyoPuyo7''. Like 15th, there are a multitude of modes and story routes to play, and even more treats like retro spells from ''Puyo Puyo CD 2'' and ''VideoGame/PuyoPuyoSun'' via cheat code.
** For the [[ArcNumber 2]][[GoroawaseNumber 4]]th anniversary, a stage play titled ''Puyo Puyo On Stage'' was performed, along with a DVD of the performance.
** For the 25th Anniversary, Sega released ''VideoGame/PuyoPuyoChronicle'', which again has lots of modes to play, but more notably, is the second time in the series after ''Puyo Puyo DA!'' to go [[VideoGame3DLeap full 3D]] with a chibi artstyle. It also introduced an RPG mode with the Skill Battle ruleset being the main focus. Despite the last anniversary games being multiplatform, ''Chronicle'' is [[UsefulNotes/Nintendo3DS Nintendo 3DS]] exclusive.
** While ''Puyo Puyo Champions'' is not an anniversary game in the same way as its predecessors, its Japanese release date was on October 25, 2018, which is the 27th anniversary of ''Puyo Puyo'' for the UsefulNotes/MSX2 and [[UsefulNotes/NintendoEntertainmentSystem Famicom Disk System]].
* ''VideoGame/StarTrekOnline'' has done a number of these for each year and then some.
** Year One Celebration - the alteration of Earth Spacedock into one more canonlike.
** Year Two Celebration - the introduction of the ''Odyssey'' and ''Bortasqu[='=]''-class ships
** Year Three Celebration - the "Temporal Ambassador" event, reintroducing [[Series/StarTrekTheNextGeneration Tasha Yar]] and the ''Enterprise''-C. The ''Ambassador''-class and ''Kamarag''-class ships joined the collection.
** Year Four Celebration - the introduction of Season 8.5, the mission "A Step Between Stars", which reintroduces [[Series/StarTrekVoyager Tuvok]] and introduces the Dyson Science Destroyer.
** Year Five Celebration - the mission "Dust to Dust", a continuation of the Kobali storyline and a follow up to the ''Voyager'' episode "Ashes to Ashes" and the introduction of the Kobali Samsar Cruiser.
** Year Six Celebration - the mission "Time and Tide", which kicks off the Temporal Cold War, and the introduction of the Krenim Science Vessel.
** There was also a celebration for ''Series/StarTrekTheNextGeneration'''s 25th Anniversary, which gave players Worf's Season One sash.
** The third expansion, ''Agents of Yesterday'', is being released in celebration of the 50th anniversary of the original series, allowing players to create a captain that hailed from that time frame.
* According to [[http://www.famitsu.com/news/201505/26079347.html Famitsu]], ''VideoGame/ProjectXZone 2'' was created not only as a sequel to ''Project X Zone'', but to celebrate the 10th anniversary of ''VideoGame/NamcoXCapcom'' as well.

* According to WordOfGod, the release of ''VideoGame/EarthBoundBeginnings'' on UsefulNotes/VirtualConsole is meant to celebrate ''VideoGame/{{EarthBound|1994}}''[='=]s 20th anniversary.
* ''VideoGame/FruitNinja'':
** To celebrate the fifth anniversary of ''VideoGame/FruitNinja'', the game has received a huge update that added a "Festival" mode, where players could win new Golden Ember blade. Similar special in-game events were also added to many of the games supported by Creator/HalfbrickStudios at the time.
** ''Fruit Ninja 2'' had its worldwide release on the original game's 10th anniversary. Additionally, ''Fruit Ninja'' itself was overhauled and ported over to UsefulNotes/{{Unity}} engine with new graphics.

* ''VideoGame/{{Yakuza}}'', otherwise known as ''Ryu Ga Gotoku'' in its native Japan, celebrated the series' tenth anniversary with two games. One was ''VideoGame/Yakuza0'', a prequel that dove into the backstory of the game's characters and settings, in addition to making BreakoutCharacter Goro Majima [[PromotedToPlayable playable for the first time in a main-series game]].[[note]]Majima was previously playable in the non-canon spinoff ''VideoGame/YakuzaDeadSouls''.[[/note]] The other was a remake of the first game, ''Yakuza Kiwami''. Not only were new features and content from ''0'' implemented into the game, but it also introduced a new mechanic based entirely around Majima, and the story was also expanded to explore [[EvilFormerFriend Akira Nishikiyama's]] descent into villainy.

** The franchise celebrated its 20th anniversary in 2016 by doing a number of things.

* The ''VideoGame/WorldOfMana'' series celebrated its 25th anniversary with a mobile and UsefulNotes/PlayStationVita remake of the first game, ''VideoGame/FinalFantasyAdventure'' (which was called ''Seiken Densetsu: Final Fantasy Gaiden'' [[MarketBasedTitle in Japan]]; the series separated from ''Franchise/FinalFantasy'' with ''VideoGame/SecretOfMana'' worldwide rather than this being a true case of DolledUpInstallment), with the remake being renamed ''Adventures of Mana'' internationally.
* In 2011, the Flash game site Creator/{{Nitrome}} released their one hundredth game -- a shooter called ''Nitrome Must Die'', in which the player goes on a quest [[SelfDeprecation to destroy Nitrome]] battling legions of characters from previous games as they do so.
* For Creator/NipponIchi's 10th anniversary, beleaguered SeriesMascot Asagi Asagiri finally gets her game made as a smartphone RPG.
* ''Franchise/TheElderScrolls'':
** Creator/{{Bethesda}} released ''[[VideoGame/TheElderScrollsArena Arena]]'' and ''[[VideoGame/TheElderScrollsIIDaggerfall Daggerfall]]'' as FreewareGames in 2004 and 2009, respectively, marking the 10th and 15th anniversaries of ''Franchise/TheElderScrolls'' series.
** For the series' 25th anniversary, ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'' was offered for free for March 25, 2019 only.
** To mark 10 years since the release of ''VideoGame/TheElderScrollsVSkyrim'', Bethesda released the ''Anniversary Edition'' on Nov. 11 2021, which made several bits of Creation Club DownloadableContent free permanently, and bundled the rest in a discounted package.
* ''[[{{VideoGame/Medabots}} Medarot Classics]]'' was released for Medarot's 20th anniversary. A [[LimitedSpecialCollectorsUltimateEdition 20th Anniversary Editon Box Set]] was released as well which contains both versions of the game, a soundtrack containing 20 of the best songs from the five games, and an art book.
* Creator/EpicGames celebrated 20 years of the ''VideoGame/{{Unreal}}'' series in May 2018 by giving [[VideoGame/UnrealI the original game]] away for free on Website/GogDotCom and UsefulNotes/{{Steam}} over a period of 48 hours.
* ''VideoGame/PAYDAY2'' celebrated its 100th update by way of a major update, the biggest pulls of which were a revamping of the game's skill system and the removal of the controversial microtransactions, making further in-game safes that could be opened to acquire skins completely free to open.
* In ''VideoGame/IansEyes'', Blue Norholm Primary School was celebrating its centinary. However, during the celebration, most of the staff and students were zombified by a slideshow.

* The IntraFranchiseCrossover ''VideoGame/PowerRangersBattleForTheGrid'' was released for the 25th anniversary of the ''Franchise/PowerRangers'' franchise (despite coming out in its 26th year).
* ''VideoGame/SoulcaliburVI'' is a ContinuityReboot that returns to the original ''Soulcalibur'' era of the series, and was chosen in part because the game was released in 2018, on the twentieth anniversary of the original ''Soulcalibur'' first hitting arcade stores.

* For their 10th anniversary in 2019, ''VideoGame/LeagueOfLegends'' developers Riot Games had quite possibly one of the biggest celebrations of any gaming company ever. For 10 years they'd focused almost entirely on their groundbreaking MOBA and its esports scene (aside from its autochess spin-off, ''VideoGame/TeamfightTactics''), despite suggestions that they diversify into other projects, but on this occasion they revealed that the reason they'd never worked on anything else was because they'd been saving it all up to show at once. Things revealed during the 10th anniversary celebration included:
** The next champion for ''[=LoL=]'', Senna the Redeemer, a character who'd been known to be dead for 6 years as part of classic champion Lucian's backstory, now brought back to life, marking a significant shift in ''[=LoL's=]'' overarching narrative.
** A streamlined mobile port of ''[=LoL=]'' called ''Wild Rift'' and a mobile port of ''VideoGame/TeamfightTactics''.
** A new digital CCG based on the ''[=LoL=]'' universe, ''VideoGame/LegendsOfRuneterra'', which would enter closed beta before the end of the year.
** Several other in-development ''[=LoL=]''-based games, including "Project L", a 1-on-1 fighting game, "Project F", a top-down adventure game of some sort, and even ''[=LoL=] Esports Manager'', which is ExactlyWhatItSaysOnTheTin.
** Their new publishing division called "Riot Forge", dedicated to supporting third-party and indie development of more games based on ''[=LoL=]'' (the first two of which, ''[=CONV/RGENCE=]'' and ''VideoGame/RuinedKing'', would be revealed later that year at The Game Awards 2019).
** Their first project completely unrelated to ''League of Legends'', a team-based tactical HeroShooter initially given the name "Project A", which was later retitled ''VideoGame/{{Valorant}}.''
** An animated series set in the ''[=LoL=]'' universe called ''WesternAnimation/{{Arcane}}'', which would be set in the dual cities of Piltover and Zaun and cover the previously-unexplained backstories of popular champions Vi and Jinx.
** Finally, every player in the game was given the [[https://cdn1.dotesports.com/wp-content/uploads/2019/10/17080330/Anniversary-1.jpg Annie-versary]] skin for classic champion Annie the Dark Child and a [[https://lolskinshop.com/wp-content/uploads/2019/12/10th-anniversary-ward-skin.png 10th Anniversary Ward Skin]].
* ''VideoGame/XenobladeChronicles1: Definitive Edition'' came out just 11 days before the 10th anniversary of its original Japanese release date.

* Although it was meant to be released in 2020 until it was delayed to 2021, ''VideoGame/TalesOfArise'' was made to celebrate the 25th anniversary of the ''VideoGame/TalesSeries''.
* ''Donkey Kong Country - The Trilogy'' is a fan game made to celebrate Donkey Kong's 40th anniversary.

* ''VideoGame/PaperMarioBlackPit'' is a [[GameMod rom hack]] of the original ''VideoGame/{{Paper Mario|64}}'' made to celebrate it's 20th anniversary.
* In 1995, Creator/HudsonSoft celebrated the tenth anniversary of their ''All-Japan Caravan Festival'' with ''Caravan Shooting Collection'', a CompilationRerelease of the games featured in the first three years of the festival (''VideoGame/StarForce'', ''VideoGame/StarSoldier'', and ''[[VideoGame/StarshipHector Hector '87]]'') for the [[UsefulNotes/SuperNintendoEntertainmentSystem Super Famicom]]. All three games are presented in their original [[UsefulNotes/NintendoEntertainmentSystem Family Computer]] aesthetics.
* ''VideoGame/GranTurismo 7'' was released in 2022 to honor the 25th anniversary of the series.
* For the 25th anniversary of the ''{{VideoGame/Fallout}}'' franchise, an alien themed update was released for ''VideoGame/Fallout76''. The game was also free to play for one week, with Amazon Prime members being able to obtain a free copy of the game and Xbox Game Pass members gaining one month of Fallout 1st, ''Fallout 76''[='=]s subscription service. Also released was the Post-Apocalyptic Loyalty Simulator (P.A.L.S.), a ''Fallout'' themed personality quiz which sorts you in one of the franchise's numerous factions. ''VideoGame/FalloutShelter'' also received an update after several years, which adds new recruitable Duellers to Lunchboxes, additional weapons to equip to Dwellers, a new theme for Diners and Living Quarters, and a new questline which is also alien themed. Amazon also shared its [[https://twitter.com/PrimeVideo/status/1584953052401848321 first official look]] at the Fallout TV series.

* To celebrate the fifth anniversary of ''VideoGame/FruitNinja'', special in-game events were added to not just ''Fruit Ninja'', but nearly all of Halfbrick's games.

* According to WordOfGod, the release of ''VideoGame/EarthBoundBeginnings'' on UsefulNotes/VirtualConsole is meant to celebrate ''VideoGame/EarthBound''[='=]s 20th anniversary.

** The franchise celebrated its 10th anniversary with the release of ''Super Monkey Ball [=3D=]''.

** The tenth anniversary was celebrated with ''VideoGame/SonicAdventure2'', which saw the release of a "Birthday Pack", which included the game, a commemorative coin, a soundtrack CD, a booklet on the history of the franchise, and a special binding to hold them together. Later that same year, an upgraded version of Sonic Adventure 2 known as ''Sonic Adventure 2: Battle'' and ''VideoGame/{{Sonic Advance|Trilogy}}'' were both released in Japan before hitting elsewhere a year later.

** Sonic's 30th Anniversary was a bit more low key compared to the previous anniversaries due to the ongoing UsefulNotes/COVID19Pandemic affecting plans, but Sega still celebrated the occasion in a big way. The occasion was celebrated by the release of ''Sonic Colors Ultimate'' (a remastered port of ''VideoGame/SonicColors''), the first unveilings of ''Sonic Origins'' (a CompilationRerelease featuring remasters of the first four classic games) and ''VideoGame/SonicFrontiers'', a 30th anniversary themed-symphony, and the release of the ''Sonic the Hedgehog Encyclo-speed-ia'', (a comprehensive encyclopedia on the history of the main series titles written by long-time ''Sonic'' comic writer Creator/IanFlynn). In addition, an official DLC pack for ''VideoGame/{{Minecraft}}'' was developed and released by Gamemode One, numerous collaborations occurred with various Sega games and [[https://twitter.com/SonicOfficialJP/status/1408062951769010180 Sonic himself became a]] VirtualYouTuber. IDW would also release several [[Recap/SonicTheHedgehogIDW30thAnniversarySpecial Classic Sonic]]-[[https://tvtropes.org/pmwiki/pmwiki.php/Recap/SonicTheHedgehogIDW30thAnniversaryFCBD2021 themed comics for the occasion]].

** With the arrival of the franchise's 20th anniversary, Sega released ''Super Monkey Ball Banana Mania'', an enhanced remake of the franchise's first three games with new features. Sonic the Hedgehog's official social media accounts [[https://twitter.com/sonic_hedgehog/status/1408151166345641985 also got in on a bit of the fun]].