Copy Kitty

Copy Kitty left Early Access and launched its full 1.0 release on April 19, 2018. Shortly after, on August 13, 2018, the developer shipped Boss Rush Mode alongside a downloadable soundtrack and explicitly stated: "This is the final content update for Copy Kitty." That announcement marks the clear end of planned content development, over seven years after the game's original development began. Since that final content update, the developer has continued to maintain the game with bug fixes and quality-of-life improvements — most notably a October 12, 2022 patch adding Steam Deck compatibility and various small fixes — but these are maintenance updates, not new content. The developer noted in that 2022 patch that they had "mostly been working on a new game" (Sunfluffs), reinforcing that Copy Kitty's content development concluded in 2018. The only DLC ever released is the Copy Kitty OST, which launched alongside the Boss Rush update on August 13, 2018, and is already available for purchase. There are no unreleased DLC entries on the store.