Destructoid noticed that Activision's Transformers games were removed from Steam and PSN earlier today.
https://www.destructoid.com/the-tran...m-478942.phtml
The removal from PSN appears to not be in every region as we can still buy them here in Australia. Also until Tuesday evening there is a sale on Transformers games on Xbox Live.
https://majornelson.com/2017/12/18/t...ight-sale-111/
It's likely that the contract for the Transformers games is up for renewal and negotiations have not finished or broken down. This could result in the games and their DLC been unavailable for many months or possibly forever. So if you really want them you may want to act now.