Wayout + Sudoku Killer (-40%)
https://store.steampowered.com/bundle/8973/Wayout__Sudoku_Killer/
Sudoku Universe + Sudoku Killer (-50%)
https://store.steampowered.com/bundle/8845/Sudoku_Universe__Killer_Bundle
Get Sudoku Killer in bundle!
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.