https://store.steampowered.com/app/858040/Sudoku_Jigsaw/
http://store.steampowered.com/app/733070/Sudoku_Universe/
Sudoku Bundle:
https://store.steampowered.com/bundle/6448/Sudoku_Universe_Bundle/
We are live!
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.