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April Fools
When April 1st arrives, April Fools' Day brings yearly shenanigans to all three Arknights servers, including giveaways and unique game modes. Strap in and enjoy the ride!
From 2022 (CN) and 2023 (Global and TW) onwards, all past April Fools events are available at the same time as part of the April Anthology, running past April 1st to April 8th.
List[edit]
April Anthology[edit]
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Why So Mysterious? Players can add Conviction to their Operator roster by redeeming a special code through Bilibili (CN), or receive her immediately through an in-game mail reward (Global and TW). Reward: Conviction CN release: 2020 Global and TW release: 2021
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Terra Night of Rap! Emperor takes to the battlefield as an unobtainable Operator in a special operation made for this April 1st! Rap battles in Terra will never be more epic than this! Reward: 1  Originite Prime and Golden Mic TrophyCN release: 2021 Global and TW release: 2022
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Dispatch Rhodes Island's mighty soldiers to fend off the onslaught of enemies. All the ammo in the world is at your disposal. Unleash! Rampage! Our goal is to defeat as many enemies as possible within the time we have! Careful, Conviction is the key to our operation. Do not let them strike Conviction down! A shoot'em up bullet hell mini-game developed by Closure, where Conviction surfs atop a hovercraft steered by the player to fend off an onslaught of enemies by using her fists of Conviction! Reward: 1 Originite Prime and Your Superconvicting FriendCN release: 2022 Global and TW release: 2023
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No, Streamer U! If you aren't able to keep things steady in the livestream, you're going to have to spend your life hiding from the debt collectors! But, if you can collect 8 pieces of broadcast footage and do a good job managing pressure, fan perception, and revenue from the platform, you'll be able to succeed for sure! Next Episode: Streamer U Bails A streamer simulator mini-game where players must help Streamer U acquire quality content for her livestream and ensure that her channel grows, as the player's decisions affect her career! CN release: 2023 Global and TW release: 2024
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Ordinary people wait for opportunities. Successful people create them. No one is born successful, but anyone can learn the secret to success. What you need is not divine favor, but the guidance of a good teacher. Legendary master Cannot's Terra Investment Masterclass will show you the best strats to success. A battle simulator mini-game where knowledge and restraint is tested as players bet on teams consisting of various enemies, witness the battle, and get paid in Originium Ingots (as long as their side wins)! It's ALL or nothing, Doctors! Reward: 1 Originite Prime and "Let Me Show You Some Good Stuff"CN release: 2024 Global and TW release: 2025
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A different path unveils itself this year; now it is the Doctor's turn to command Reunion fighters to break through Rhodes Island Operators in their way. Take command of the Reunion Movement, and liberate the Infected! Reward: 1 Originite Prime and 整合运动纪念牌 furnitureCN release: 2025 Global and TW release: 2026
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Heat Pump Passage[edit]
During 2020's April Fools on the CN server, the Heat Pump Passage was jokingly teased as an upcoming Operator.
Reunion hacking incident[edit]
During 2020's April Fools on the EN and JP servers, the Rhodes Island communications network was hacked by Reunion, giving all Doctors a 
Top Emergency Sanity Potion and 20000 
LMD (through in-game mail) to persuade them to join their cause. Fortunately, R.I. managed to regain control over the network and sometime afterwards gave a 
Chip Catalyst, 30000 LMD, and 200 
Orundum as an apology for the breach.
Reunion headhunting banner[edit]
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During 2020's April Fools on the KR server, a banner which featured various Reunion leaders as the rate-up Operators was jokingly teased.
W and Crownslayer would be introduced as Operators much later, during Episode 07 and I Portatori dei Velluti respectively.