Final Fantasy XV was a triumph not just for the Final Fantasy franchise, not just for Square Enix, but for RPGs as a whole. The game proved that these large-scale RPGs could be made with such quality and reverence that people would respond to it and buy it. Which led to the game becoming the fastest-selling title in Square Enix history, as well as Final Fantasy history. So, it’s not surprising that they’re also bringing the game to the PC.
But, you might be surprised to hear that Square Enix planned to do that from the very beginning. In fact, they knew right when they started development that they wanted to bring it to the PC. But why? Well, some of the team talked with Rock Paper Shotgun and explained:
The reason we had a PC version on the cards right from the beginning was that we very much had a policy and a vision of getting Final Fantasy XV to as big a player base as possible. Obviously, there are a lot of very large PC markets out there, so in order to satisfy those customers and give it to them we needed to do a PC version.

Source: GameCrate
That makes sense, as PC does have a very loyal fanbase. The team also noted that they didn’t want to do a “basic port” of the title, as that would be a disservice to PC players, something that other developers should make note of.
One of the more recent additions to Final Fantasy XV, the Comrades multiplayer extension, was actually planned to launch with the PC version, but they were able to get it done ahead of time:
Everything has really gone to plan. The multiplayer content was very much designed to work with the Windows Edition, but it was actually developed in advance so we could really get it in and working first.
So, you’ll be able to enjoy the full version of Final Fantasy XV on PC when it launches March 6th.