Serious Sam on an xBox?

[300bhp/ton]

I've got Serious Sam HD: TFE and Serious Sam 3 on my xBox 360 that I bought and downloaded from Xbox Live Arcade a good few years back (along with Doom, Doom 2 and Duke Nukem 3D).

I have two questions. Firstly what has happened to the games on Xbox Live? Searching on the 360 for Serious Sam yields only demo's and trailers. Have they removed the actual games?? (would seem bonkers keeping the trailers and demos if so....)


Secondly, is there any way I can "transfer" these to my Xbox One? I have downloaded Doom and Doom 2 on the Xbox One, but as Serious Sam returns no results at all when I search on the Xbox One, I'm guessing there is probably bugger all I can do.