Neon Koi was a German-Finnish developer that was founded in 2020 under the name 'Savage Game Studios'. It was under this initial name when Sony acquired them in August 2022, before rebranding to Neon Koi in November 2023 after many leadership resignations.
When it comes to Neon Koi's PS5 output, they didn't release anything. That's because they were a founding member of PlayStation Studios's Mobile Division and acquired to exclusively develop mobile games. According to their 2022 acquisition press release, this was supposedly a AAA live-service action game that was still very early in development.
Neon Koi closed in October 2024. And despite forming four years before closure, NK didn't even announce the name of their action game, let alone show gameplay or actually ship.
In fact, Neon Koi was only known for negative headlines. Like when the head of PlayStation's Mobile Division and an SGS founder abruptly quit under suspicious circumstances, or the failed rebranding to Neon Koi in 2023.
At best, Neon Koi are an insignificant footnote in PlayStation's history during the PS5 era. At worst, NK are a glaring example of mistakes made by former PlayStation leadership. Such as short-sighted, poorly researched acquisitions to wasted spending on games that were cancelled before they were even announced. NK embodies the missteps of the Jim Ryan era.