C2 Architecture has announced they’re starting work again on Plan-[ki], a strategy RPG for PC and mobile. Although the announcement was made on April 1st, it’s confirmed to be genuine because it was posted after midday in Japan.
Plan-[ki] was first announced in April 2011 as a PC game that would combine the storytelling of visual novels with strategy gameplay. It was designed for Windows XP, Vista, and 7. The developers, C2 Architecture, originally aimed to release it in 2011, but they paused development to focus on their more famous game, Kantai Collection (also known as KanColle).
Wow, it’s been a while! I remember checking this game’s page back in 2019 when the developers said they were trying to get Plan-[ki] going again, but we didn’t hear much after that. It’s awesome to finally get a new announcement! And get this – the character designers, Konishi and Shibafu, actually did a ton of work on the shipgirls in KanColle! That’s pretty cool to know, and explains why the designs look so good.
The original announcement was first posted in Japanese, which you can see below. We’ve also included an English translation for you.
So, I recently found out about this really cool project C2機関 was working on before KanColle blew up – it’s called the “Ki-gou Project” (or #キ号計画)! Development stalled when KanColle took off, but now a lot of us are jumping in to help get it back on track. It’s a PC & mobile SRPG – think historical sci-fi – and things are starting to come together! The main characters are Konishi and Shibafu, and honestly, I’m super excited to see what they reveal soon!
— C2機関 (@C2_STAFF) April 1, 2026
C2 Architecture began working on the Plan-[ki] project before the popular game KanColle was released. However, development on Plan-[ki] was halted because KanColle unexpectedly became a huge success.
We’re making good progress on development, and we’ve got a lot of support from our friends! This includes plans for ‘C2 Architecture,’ a PC and mobile SRPG set in a historical science fiction world – we hope to share more details soon! Konishi and Shibafu are working on the character designs.
We’re developing a brand new game centered around communication, and it features mechs! The setting is a unique, alternate take on the Showa era. We’ve unexpectedly decided to build the whole thing in 3D, and we’ve been keeping it under wraps. Stay tuned – we’re excited to share more, even if it’s just a little bit at a time!
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2026-04-01 19:26