The person that Guinness World Records has been able to find with the biggest collection of video game titles in the world is Michael Thomasson.
This man has 11,000 + games. And he's selling them, all, in one big bundle.
Spanning 21 consoles this collection has been put up for auction. Some might think that this is due to him losing interest but that is far from the case. Thomasson made it clear that he had an immediate family issue that require lots of money; he's decided to sell the collection to help them out.
The amazing part about this collection is that he had sold it twice before but always rebuilt it. I can imagine even after making it to this size he won't stop buying games.
The current bid as of typing this article is "Current Bid: $98,500.00 by bigman107."
I'm sure he'll be able to reach a 100K milestone.
If you've got a lot of money that you have no idea what to do with and love games... well I guess you could offer your bid! Then never stop playing games again...
Source: Polygon and GameGavel