I can't really think of any games I've bought, and I can't think of any game that they publish that I want to buy. I don't get it.
Is this like how CDPR were super overvalued?
This is nothing like how CDPR was over-valued. Nordic Games started off by acquiring the assets of JoWood Entertainment after the company dissolved. They then re-released the games owned by JoWood Entertainment and acquired enough capital to acquire the remaining THQ franchises that none of the other buyers wanted.
Eventually, they acquired the THQ trademark and re-branded as THQ Nordic and repeated the remaster and re-release model adopted with their JoWood Entertainment assets. They then had enough capital to acquire more dormant intellectual properties and remaster and re-release them. The profits made from remastering and re-releasing dormant IP's alongside investor backing gave them the capital to acquire Koch Media and merge with them so that they had the development and publishing assets to do AAA games.
Since then, they've had the money to acquire more developers that the major publishers didn't really care for at the time. And with more games being sold due to more developers being available to them to release more games and more investors investing in the parent company, they've been able to expand into acquiring mobile/social gaming publishers like DECA Games and Easybrain.
Embracer Group has been successful because they've been selective with what assets to acquire and how to integrate them into their business.