Assassins Creed Odyssey has been discounted to $22.49 on PC for the next 48 hours only. The deal is only valid for the digital version of the game. The code is provided via Fanatical. A free Uplay account is required.
Fanatical is also running an Assassins Creed franchise sale. You can get Assassins Creed Origins Deluxe Edition for just $19.83.
Source: N4G PC Assassins Creed Odyssey and Origins are both on sale for PC