Ultimate Sudoku Collection

Ultimate Sudoku Collection launched on May 18, 2018 and has grown steadily over the years. The developer added new Sudoku variants in three distinct waves: Parquet and Tight-Fit types in September 2018, Tridoku and Star Sudoku in June 2020, and Basic Jigsaw/Diagonal/Anti-Diagonal types in November 2020. Each of these additions came with corresponding DLC puzzle packs. Following the November 2020 update, the developer shifted to quality-of-life and technical improvements — adding an input method option, improving highlighting, refining window resolution handling, and integrating Steam Cloud save syncing. The last developer communication was on June 16, 2022, with version 1.4.5. All 27 DLC packs are released, and the developer has made no announcements of future content since that update. The gap between the last post (June 16, 2022) and today (June 15, 2026) is nearly four years, far exceeding the historical update rhythm. There are no outstanding commitments, no unreleased DLC, and no developer statements suggesting further development. The game appears to have reached its finished state with the June 2022 update.