You need not wait for the Steam Holiday sale to get a good deal on Deus Ex: Mankind Divided.
The PC version of Deus Ex: Mankind Divided is heavily discounted on Steam right now. Valid for the next 33 hours, the deal brings the game's price down to its lowest since it launched in August.
The 67 percent discount translates to just $19.79 / £13.19 / €16.49. The deluxe edition is also on sale, for 45 percent off.
If it does turn out to be slightly cheaper, you'll be able to refund it through Steam as long as you haven't played it for over 2 hours.