I'm just being a smartass. :D It really is a brilliant idea. My only concern would be people losing track of where the game world ends and the real world beings. Actually, that might make the game even better!

I'd fund a game with a new open source free for everyone super multipurpose Linux game engine that can handle all the Linuxes and all the gametypes and is generally the hyper bestest engine there is. The game itself would be a FPP game about a cowboy in colorful clothing finding himself in a world full of ducks and he must find a way to become the king of all the said ducks to prevent a horrible duck invasion. This kingship could only be achieved by engaging ducks of power in "combat" with a highly revolutionary "fighting system" in which you must do a duck mating dance to the beat of the high energy pupstep (electronically distorted dog barks, it's going to be huge with the teenagers) soundtrack. Failure in a "fight" will result in you looking foolish in front of a duck. There are various romance options as you come to love yourself again, and can do things like take yourself to the movies (that's movies about ducks).

Too much money corrupts the mind..

If you could get the rights to base it around "Call of Cthulhu" you could have some fun with that.

"A local detective at the turn of the 20th century in New England is called to investigate a crime scene. An old man was found dead in a locked house. He was covered in blood, yet had no wounds and the house was completely unremarkable with the exception of a strange small green soapstone statue sitting on the center of his coffee table in his sitting room..."

If by sarcasm you meant my "brilliant idea" comment then NO, ABSOLUTLY NOT; I really do think it is a phenom idea. I know nothing about the tech side of pc gaming so I'd be curious to see if it could work the way you mean it to. I just think it's a trip then when I was a kid we had Pong and it was golden, now here we are talking about a game with characters and gameplay that actually 'evolve'. Far out.

I love the cthulhu mythos but that's already been done and there was a movie called "cabin in the woods" that was very similar. Although it would have a very cthuhu-esque vibe.Similar and yet grander and very different. I reckon that it could be set in the 20's and we would start off with the black dahlia case or something that is reminiscent of that period...

Are they early black & white Duck movies?
Or is he a modern day Cowboy?

In my opinion,if you have this goal to make a game, it won't succeed. Game is a method to release presure, not make money.

It would be pretty cool if someone would get around to creating something of that sort....

I asked this exact thing a while back.

Cyberpunk Western open world action RPG. And hey look. CDPR is making that. I win.

You need some mystery in every romance ;)

If I had limitless funds, you can be damn sure I'm not going to hire out some other studio to make my game. I'd form my own studio. I've got plenty of ideas for games that would require a AAA budget. Unfortunately, most of them are just little vignettes or abstract concepts, since I don't really have any reason to develop them any further, as I'm not actually in possession of unlimited funds :P. The one concept I've been toying with (and creating different 2d versions of) for years involves a large rotten swamp filled with industrial ruins and trash, with dynamic sandboxiness like that of STALKER, but with more focus on survival mechanics and emergent storytelling. If I did that, I'd probably try to pick up the leftovers of the STALKER team, at least. Probably a few of the more prominent STALKER modders too. And I would also hire the Johnson brothers to work on the skies and weather effects :P.

Truthfully, though, I'd probably be happier with a small indie team (like, 3-5 other people), or just continuing to work on my own.

Yeah, it's called Alpha Protocol :-P Seriously, go play it.

A massive silent (no chat) multiplayer game with both human players and AIs.

From there, I'd try to make the AIs as indistinguishable from the human players as possible.

That's if I had limitless funds.

I don't think such an idea is feasible in a for profit game.

I would rather be a developer with unlimited funds. I'd work on my own games, and probably let Gas Powered Games make one just to give them some money so they stay alive (probably the RPG I call Heart of Stone but will have to find another name for because that's taken). I'd also help all the Kickstarter projects I like with really big sums instead of the few dollars I give them from my currently limited budget.

Edit: As a producer with unlimited funds I'd probably go on to support the creation of a new City of Heroes game. I'll have enough funds to get Jane Jensen, Tim Schafer, Ron Gilbert (once he finishes the next Monkey Island), Chris Avellone and probably a few others to write varies stories for the game.