$10 Billion. I will limit this to private companies only given MS’s resistance to buying public firms. Here is what I would get.
Jackbox Inc. for $300 million. Fun, streamer beloved games. Don’t have to be exclusive, just a good investment.
Level 5 for $1.5 billion. A good investment in Japanese content.
Embracer Group for $5 billion. A great, diverse team of studios across all genres.
Bungie for $1.5 billion. Bring them home. Destiny remains multiplat, future games exclusive.
WayForward for $300 million. A good developer with a great track record of speed.
Asobo $400 million. Bring them into the family.
Spend the final $1 billion on expanding existing studios like BGS (for a new Fallout game), Ninja Theory, PlayGround and Double Fine.