A corporation is a legal construct. While it’s theoretically possible for a single business to grow very large, most of the exploitation and legal cover provided by the simple act of incorporation becomes nearly impossible.
Plus without a state to push down competition, it becomes a lot harder to monopolize a market. Ideally there wouldn’t even be a market to monopolize, but that’s a different discussion altogether.
Last I remember, Baldurs Gate was on 6 separate discs, but I haven’t installed it from those in probably 20 years.