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Thirty years of adventures under his belt and yet, he's still fifteen.

Milestone Celebrations in Video Games.


  • Back to the Future: The Game was released the year of the 25th anniversary of the release of Back to the Future.
  • Capcom loves 'em:
    • Capcom celebrated Mega Man's 15th anniversary by releasing the Anniversary Collection, a Compilation Re-release of all of the console Mega Man (Classic) games (1-8, plus the arcade games Power Battle and Power Fighters).
    • Mega Man 8 was a 10th anniversary special, with an art booklet of previous games, and an animated intro that was a callback to the whole series at that point.
    • Capcom celebrated Mega Man's 25th anniversary with Rockman Xover. However, after the negative backlash the game received, they supported the fan-made (and much better received) Street Fighter X Mega Man as an anniversary game for both franchises.
    • To celebrate the 30th anniversary of the Mega Man franchise, Capcom announced the release of Mega Man 11, the first game in eight years since the release of Mega Man 10.
    • Capcom celebrated Street Fighter's 15th anniversary by releasing the Street Fighter Anniversary Collection, which had Hyper Street Fighter II and Street Fighter III 3rd Strike. Oddly enough, the original Street Fighter wasn't present.
    • Street Fighter 30th Anniversary Collection contains the original Street Fighter, Street Fighter II and its updates (up to Super Turbo), Street Fighter Alpha 1-3, and Street Fighter III and both of its updates which include Giant Impact and 3rd Strike.
    • For the twentieth anniversary of the release of Bionic Commando (1988), a 2.5-D remake of the original was released in 2008, with a fully 3-D sequel following in early 2009.
    • Capcom's 40th anniversary was celebrated with Capcom Town, a Capcom-themed virtual city featuring a museum of Capcom's many franchises, and also includes playable versions of Mega Man, Mega Man 2, Mega Man X, Street Fighter II and Final Fight, in both English and Japanese.
  • Castlevania:
  • Contra 4 was released at the 20th anniversary game for the series, emphasized with its heaps of series Fanservice (although the other type is unlockable).
  • Donkey Kong Country - The Trilogy is a fan game made to celebrate Donkey Kong's 40th anniversary.
  • Double Dragon: Both Double Dragon Neon and Abobo's Big Adventure were released in 2012, coinciding with the franchise's 25th. Both are wacky parodies of the seminal beat'em up as well as 80s culture in general; Neon takes on 80's music and fashion, while Abobo spoofs the NES library in particular (it's also a lot gorier...).
  • Drakengard 3 was meant as this for the Drakengard series, marking its 10th anniversary.
  • According to Word of God, the release of EarthBound Beginnings on Virtual Console is meant to celebrate EarthBound's 20th anniversary.
  • EA Sports listed Madden NFL 2005 at the 15th anniversary of the series, and released a collector's edition with earlier versions of the game updated with modern rosters. Oddly enough, Madden 2009 was billed as the 20th anniversary, and the would-be Madden 2014 was billed as Madden 25. Math never was EA's strong suit. note 
  • The Elder Scrolls:
  • For the 25th anniversary of the Fallout franchise, an alien themed update was released for Fallout 76. 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. Fallout Shelter 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 first official look at the Fallout TV series.
  • Final Fantasy:
  • Fruit Ninja:
    • To celebrate the fifth anniversary of Fruit Ninja, 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 Halfbrick Studios 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 Unity engine with new graphics.
  • Ghostbusters: The Video Game was released in 2009, marking the 25th anniversary of Ghostbusters (1984). It received a remaster in 2019, marking both its 10th anniversary and the 35th anniversary of the franchise.
  • Gran Turismo 7 was released in 2022 to honor the 25th anniversary of the series.
  • Half-Life came out in November 1998. In November 2008, Valve offered the game to anyone who still didn't own it on Steam for 98 cents.
  • Halo:
    • The first game got a graphically revamped Updated Re-release with bonus story content and a Halo: Reach Nostalgia Level 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 Bungie became an indie studio.
    • They did it again for the ten year anniversary of the 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 Halo 5: Guardians multiplayer beta.
    • Halo Infinite was released close to the 20th anniversary of Combat Evolved, and thus the 20th anniversary of the original Xbox. Also for this milestone, 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 Halo: Ghosts of Onyx and became a staple of the Halo Expanded Universe despite never being seen in the games until now) and Orion (based on the pre-release MJOLNIR design from the 1999 Macworld demo).
  • Harvest Moon had two Spin-Off games made for the series' 10th anniversary: Rune Factory: A Fantasy Harvest Moon and Innocent Life: A Futuristic Harvest Moon. The former proved popular enough to become its own series. Also for their 10th anniversary Marvelous released two Harvest Moon games, DS and Magical Melody. Both games were throwback games with the former taking place in Forget-Me-Not Valley 100 years in the future, and the latter featured characters from previous games (mostly from the first game of the series). Both games are often cited as being the end of the "classic" Harvest Moon period due to future games being vastly different from the older Harvest Moon style. The odd part is, though, the games were released in 2005 when the 10th anniversary was in 2006.
  • In 1995, Hudson Soft celebrated the tenth anniversary of their All-Japan Caravan Festival with Caravan Shooting Collection, a Compilation Re-release of the games featured in the first three years of the festival (Star Force, Star Soldier, and Hector '87) for the Super Famicom. All three games are presented in their original Family Computer aesthetics.
  • In Ian's Eyes, Blue Norholm Primary School was celebrating its centinary. However, during the celebration, most of the staff and students were zombified by a slideshow.
  • Kingdom Hearts 3D [Dream Drop Distance] marks the 10th anniversary of the Kingdom Hearts series, noted in-game with a story recap feature to prevent Continuity Lockout. Coincidentally, it also has a tip of the hat to the 30th anniversary of TRON on the same year with the inclusion of a TRON: Legacy world. For its 15th anniversary celebration, both 1.5 and 2.5 ReMIX are to be combined and ported to the PlayStation 4.
  • The King of Fighters XII was rushed to market to mark the series' 15th anniversary. As Sonic the Hedgehog (2006)'s equal circumstances had already demonstrated, results were disappointing.
  • Kirby:
    • While previous anniversaries were celebrated in a low key fashion, Nintendo and HAL decided to go all out for the franchise's 20th anniversary, which they would do so by making a Compilation Re-release for the Wii titled Kirby's Dream Collection, which compiled all three Dream Land entries, Kirby's Adventure, Kirby Super Star and Kirby 64: The Crystal Shards in one package. The compilation also contains additional goodies and content as well, such as an art book and soundtrack, an in-game museum that goes through both Kirby's history and real world events that coincided with the games, a couple of episodes from Kirby: Right Back at Ya!, and new challenge stages based off of the ones from Kirby's Return to Dream Land.
    • Nintendo and HAL decided to go even bigger with Kirby's 25th anniversary, commemorating the occasion with plenty of new anniversary merchandise, a new website in Japan, themed artwork posted on the franchise's Twitter account, themed pop up cafes titled "Kirby Cafe", and an orchestrated concert. Nintendo and HAL would also release Kirby Star Allies later the same year, which appropriately enough, serves as a massive love letter to the franchise as a whole, a fact that is made all the clearer by the addition of Dream friends, which saw the return of many Kirby characters, some of which hadn't been seen in decades. Kirby's classic Dream Land design even makes a reappearance as an unlockable alt skin.
    • Kirby's 30th anniversary saw the release of Kirby and the Forgotten Land, the franchise's first mainline 3D platformer, and Kirby's Dream Buffet.
  • For their 10th anniversary in 2019, League of Legends 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, Teamfight Tactics), 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 Teamfight Tactics.
    • A new digital CCG based on the LoL universe, Legends of Runeterra, 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 Exactly What It Says on the Tin.
    • 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 Ruined King, would be revealed later that year at The Game Awards 2019).
    • Their first project completely unrelated to League of Legends, a team-based tactical Hero Shooter initially given the name "Project A", which was later retitled Valorant.
    • An animated series set in the LoL universe called 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 Annie-versary skin for classic champion Annie the Dark Child and a 10th Anniversary Ward Skin.
  • The Legend of Zelda:
  • Lies of P made its' debut during the 140th anniversary of the book it is inspired from, The Adventures of Pinocchio in 2023.
  • The Like a Dragon/Yakuza series, otherwise known as Ryu Ga Gotoku in its native Japan, celebrated the series' tenth anniversary with two games. One was Yakuza 0, a prequel that dove into the backstory of the game's characters and settings, in addition to making Breakout Character Goro Majima playable for the first time in a main-series game.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 Akira Nishikiyama's descent into villainy.
  • Medarot Classics was released for Medarot's 20th anniversary. A 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.
  • The Metal Gear series had two anniversary campaigns dedicated to it:
    • The 20th Anniversary campaign (the official logo being a pair of dog tags) saw a plethora of merchandises being released such as collectable figurines, soundtracks, t-shirts and of course, anniversary-themed reissues of the games themselves.
    • For the 25th Anniversary campaign (the logo this time being Snake hiding under a cardboard box with his legs sticking out) saw a similar influx of collectables, most notably "PlayArts Kai" figures based on characters from the original Metal Gear Solid, as well as an entire event dedicated to showing off the next entry in the series, Metal Gear Solid: Ground Zeroes (which later evolved into Metal Gear Solid V: The Phantom Pain).
  • Metal Slug 6, along with Metal Slug 3D and the Metal Slug Anthology pack was created to celebrate Metal Slug's 10th anniversary.
  • For Mini Metro's 10th anniversary, three new maps from Mini Motorways, Tokyo, Lisbon, and Warsaw, were added in the July 25, 2023 update. Conversely, Dinosaur Polo Club opened a poll for players to vote on which maps from Metro would be featured in Motorways. New York City, Mumbai, and London were the Top 3 winners and were added in the latter game on the same day.
  • For Nippon Ichi's 10th anniversary, beleaguered Series Mascot Asagi Asagiri finally gets her game made as a smartphone RPG.
  • In 2011, the Flash game site Nitrome released their one hundredth game — a shooter called Nitrome Must Die, in which the player goes on a quest to destroy Nitrome battling legions of characters from previous games as they do so.
  • Pac-Man:
  • Paper Mario: Black Pit is a rom hack of the original Paper Mario made to celebrate it's 20th anniversary.
  • PAYDAY 2 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 November 2014, Sony celebrated the 20th anniversary of the Japanese launch of the first Playstation by releasing a Limited Special Collector's Ultimate Edition PlayStation 4 featuring a color scheme similar to the original console. It was produced in extremely limited quantities.
  • The Intra-Franchise Crossover Power Rangers: Battle for the Grid was released for the 25th anniversary of the Power Rangers franchise (despite coming out in its 26th year).
  • Pokémon:
    • The franchise celebrated its 20th anniversary in 2016 by doing a number of things:
      • For each month of the year starting in February, one Mythical Pokémon was distributed for the Generation VI games via various outlets depending on region (usually download codes given out at game stores for free). The release order was Mew in February, Celebi in March, Jirachi in April, Darkrai in May, Manaphy in June, Shaymin in July, Arceus in August, Victini in September, Keldeo in October, Genesect in November, and Meloetta in December.
      • On the actual anniversary date of February 27, Pokémon Red and Blue, Pokémon Yellow, and Pokémon Green (Japan only) were released on the 3DS Virtual Console. Also released were specially colored 3DS/2DS bundles with one of the correspondingly-colored games already installed.
      • Also on the actual anniversary date (in Japan), there was a worldwide announcement for the next core games, Pokémon Sun and Moon with a Holiday 2016 release date.
      • The earliest cards from the official Trading Card Game were reprinted.
      • Two new games were released, Pokémon GO for mobile and Pokkén Tournament for the Wii U.
      • Pokémon: The First Movie, Pokémon 2000, Pokémon 3, and Pokémon 4Ever were digitally remastered.
      • In Super Mario Maker, three Pokémon costumes (based respectively on Bulbasaur, Charmander and Squirtle) were made unlockable in an update.
      • Pokémon's official Youtube channel also released a number of shorts called Pokémon Generations, which can be viewed here.
    • For the 25th anniversary, Pokémon Brilliant Diamond and Shining Pearl, remakes of Pokémon Diamond and Pearl for the Nintendo Switch were announced for a late 2021 release. Also announced for a 2022 release is Pokémon Legends: Arceus, a seemingly Wide-Open Sandbox take on the series set in a feudal-era Sinnoh.
    • Gimmighoul and Gholdengo are Milestone Celebration Pokémon being the 999th and 1000th Pokémon in the series' Pokédex; with Gimmighoul debuting almost simultaneously in Pokémon Scarlet and Violet and Pokémon GO and requiring an in game grind of 999 coins to evolve into Gholdengo.
    • In honor of exceeding 1000 Pokémon with Pokémon Scarlet and Violet, the official YouTube channel premiered a special nine-minute video showcasing all 1008 Pokémon, with the first six minutes being a recap of the first eight generations of Pokémon sorted by situational encounters, evolution gimmicks, etc., and the remaining three minutes featuring the Scarlet and Violet newcomers presented by their National Pokédex numbers.
    • Pokémon Sleep gave out free gift bundles for various milestones such as reaching 10 million downloads and its 6-month anniversary.
  • According to Famitsu, Project × Zone 2 was created not only as a sequel to Project X Zone, but to celebrate the 10th anniversary of Namco × Capcom as well.
  • Puyo Puyo:
    • For the 15th anniversary, Sega released Puyo Puyo! 15th Anniversary, 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 Puyo Puyo!! 20th Anniversary, which invited characters that debuted or returned from Puyo Puyo 7. 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 Puyo Puyo Sun via cheat code.
    • For the 24th anniversary, a stage play titled Puyo Puyo On Stage was performed, along with a DVD of the performance.
    • For the 25th Anniversary, Sega released Puyo Puyo Chronicle, which again has lots of modes to play, but more notably, is the second time in the series after Puyo Puyo DA! to go 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 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 MSX2 and Famicom Disk System.
  • Raiden V was planned to have a 2015 release to coincide with the main Raiden series' 25th anniversary. However, it was delayed until February 2016, in which, coincidentally, 2016 was the 25th anniversary of Raiden Trad (the first Raiden consumer port) as well as 20th anniversary of Raiden Fighters spinoff, which Word of God never explicitly mentioned on.
  • Ratchet & Clank: Full Frontal Assault was released to commemorate the duo's 10th anniversary.
  • 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.
  • The SaGa series celebrated its 20th anniversary by remaking Final Fantasy Legend II as SaGa 2 Hihou Densetsu -Goddess of Destiny-...and releasing a 20-disc compilation of all the SaGa soundtracks.
  • 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.
  • The Sims 3: 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, and the vibrating love bed.
  • 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) Crystalis, Ikari Warriors, and Psycho Soldier. They also released the Neo Geo Mini, a plug-and-play console designed after the Neo Geo arcade cabinets of the 1990s and containing forty different games.
  • Solatorobo: Red the Hunter is considered to be CyberConnect2's 15th anniversary celebration, being a Spiritual Sequel to the very first game they developed. Likewise, Fuga: Melodies of Steel is treated as their 25th anniversary celebration.
  • Sonic the Hedgehog has gone through several, starting in 2001:
    • The tenth anniversary was celebrated with Sonic Adventure 2, 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 Sonic Advance were both released in Japan before hitting elsewhere a year later.
    • The fifteenth, in 2006, with Sonic Riders, Sonic the Hedgehog Genesis and Sonic the Hedgehog (2006).
    • The 20th anniversary game (2011), Sonic Generations, builds off the successes of Sonic Colors and Sonic the Hedgehog 4 one year prior. Its biggest selling point is 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. 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 Vocaloids get in the act in a minor way, as the third title of Sega's Project Diva series of Vocaloid Licensed Games, released just a few days after Generations, includes a Vocaloid cover of "Live & Learn" in the bundled bonus CD and an in-game Sonic costume for Miku because of Generations (in contrast the other Sega-themed costumes in the seriesnote  were included merely for the sake of Shout Outs).
    • Sonic Mania and Sonic Forces were both made for the 25th anniversary. The former is a Retraux 2D platformer headed by several Promoted Fanboys, while the latter brought back Classic Sonic again for a Crisis Crossover. 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 COVID-19 Pandemic 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 Sonic Colors), the first unveilings of Sonic Origins (a Compilation Re-release featuring remasters of the first four classic games) and Sonic Frontiers, 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 Ian Flynn). In addition, an official DLC pack for Minecraft was developed and released by Gamemode One, numerous collaborations occurred with various Sega games and Sonic himself became a Virtual YouTuber. IDW would also release several Classic Sonic-themed comics for the occasion.
    • 2023 appears to be the year of Amy Rose, who made her debut in 1993's Sonic CD. The spinoff Visual Novel The Murder of Sonic the Hedgehog is set during Amy's birthday, Sonic Origins received the Plus Expansion Pack that has Amy Promoted to Playable among other additions, and Sonic Superstars has Amy adventuring alongside Sonic, Tails, and Knuckles.
  • Soulcalibur VI is a Continuity Reboot 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.
  • Space Invaders celebrated their 30th anniversary with Space Invaders Get Even, where the eponymous invaders become Villain Protagonists. They also released Space Invaders Extreme, which is a modern revamping of the game.
  • Splatoon 2 did the following to celebrate its first anniversary of release:
    • The Splatfest for July, its month of release, was Squid vs. Octopus, reflecting the Inklings and the Octarians. Your player character also matched your side, meaning that people can try out Octolings without buying the Octo Expansion. During the Splatfest itself, confetti fell at the start of each match, and the Shifty Station had fireworks, neither of which other Splatfests had. In-universe, Pearl and Marina note that it's first anniversary of them hosting Inkopolis News.
    • In Salmon Run, the shift on the anniversary was an exact copy of the one on launch day note . Earlier in the month, there was a special shift with nothing but Grizzco weapons.
  • Star Trek Online 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 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 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 Star Trek: The Next Generation'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.
  • Super Mario Bros.:
  • Super Monkey Ball:
    • 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 also got in on a bit of the fun.
  • The Super Robot Wars franchise often releases a new installment for every fifth year since its inception:
  • Although it was meant to be released in 2020 until it was delayed to 2021, Tales of Arise was made to celebrate the 25th anniversary of the Tales Series.
  • Parodied in Team Fortress 2: 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.
  • The developers of Terraria schedule its final and largest update, "Journey's End", for May 16, 2020 - the 9th anniversary of the original release.
    • Followed by a smaller update exactly a year later which adds another special world seed accessed by typing "celebrationmk10" or numbers corresponding to the update release date or Terraria's original release date ("05162011", "05162021", etc.). Doing so spawns you on a painted beach on either side of the world with a party immediately started and several NPCs, three of them named after the lead developers.
  • Twisted Wonderland: To celebrate the first anniversary of the game, the "First Anniversary" event was held from March 8 to March 22. The story chapters of the event say that March 18 was the day when Night Raven College was founded, and a ceremony is held every year on the anniversary of that date, of which the first year students are shown enjoying the festivities.
  • Epic Games celebrated 20 years of the Unreal series in May 2018 by giving the original game away for free on GOG.com and Steam over a period of 48 hours.
  • WarioWare Gold came out in 2018, the 15th anniversary of the franchise. While it isn't explicitly tied to the anniversary, one of the unlockable phone codes has one of the game's devs acknowledge the milestone.
  • The World of Mana series celebrated its 25th anniversary with a mobile and Play Station Vita remake of the first game, Final Fantasy Adventure (which was called Seiken Densetsu: Final Fantasy Gaiden in Japan; the series separated from Final Fantasy with Secret of Mana worldwide rather than this being a true case of Dolled-Up Installment), with the remake being renamed Adventures of Mana internationally.
  • Xenoblade Chronicles 1: Definitive Edition came out just 11 days before the 10th anniversary of its original Japanese release date.

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