He came to be famous for making military sims/flight sims. When they ventured into a new genre with "Pirates" they wanted to get the people who only knew their

He came to be famous for making military sims/flight sims. When they ventured into a new genre with "Pirates" they wanted to get the people who only knew their military sims on board, so they added "Sid Meiers" to the name and this seems to have helped in getting people to consider a game in a completely different genre, because they thought of him as someone who built good games (and rightfully so, I may add).