Lots of adults that grew up with Pokemon still play some of the games, there is a fairly new one i believe (Pokemon X/Y ?) I don't know that much about it, was never into it. But it isnt necessarily for little kids.
The Elder Scrolls series was always only single player but just in the last two weeks an MMO (multiplayer) version of it came out. But if he specifically referenced TES IV that would be Oblivion, a game from about 7 years ago. Skyrim was TES V which is what most people have been talking about for a long time, and then just recently the MMO which is called Elder Scrolls Online.
Anyway, it is an RPG style, explore the world, kill monsters, level up skills, type game. It is not particularly graphic violence except Skyrim had some slow motion death scenes that were pretty intense, some people would find them too graphic for sure.
Just to be clear on my opinion, the video games he played would be near the bottom of any list i was compiling of contributing factors.