Okay, not only will this game encompass everything I'd want in a perfect game, it'd actually change the world. This'll be a long read so prepare your self.
First, I'd start by buying out every single company associated with gaming(Microsoft, Valve, Sony, Nintendo, ect) every single computer company(Intel, AMD, Apple, ASUS, ect), and all of New Zealand and make them into one large super company that is now based all over New Zealand. I'd also start recruiting the best neuro scientists and engeneers money can buy and put them on a team.
Next, I'd have the team of scientists start work on a matrix esque simulator that over takes all of your senses but without the plugs and is completely controlled by the user. Once this was done, I'd have the scientists start work on some sort of stasis machine so as to not lose any age while wasting away time on the new revolutionary games soon to come out.
Now, using all the companies I'd just bought, I'd combine them into one eliminating competiton, eliminating stupid lawsuits, making one company set for the furthering of society. First I'd trash all current parts and buy back anything people had for 1000% increase in what the price was when it came out, eliminating inferior tech. Next, I'd start them off manufacturing the soon to be released VR Simulators while working on the dozens of games to come for it. The lead title will be the greatest to ever come out, though.
The Lead title would be Fallout esque. It'll be set 200 years in the future where human kind is just starting to colonize space. The world is falling into immense conflict due to huge population increases and the quickly depleating resouces found on Earth and nearby planets. You were born two days before the bombs drop, killing 90% of the life on Earth and heavily mutating the other 10%, but you and your family managed to escape in a ship with thousands of others before the bombs dropped, effectivly saving your life. The game would skip through your childhood, showing life on the ship and what you went through to stay alive. Eventually the ship goes back to Earth to see if theres any hope, only to be attacked by the new life inhabiting it, leaving the ship destroyed and the people to have to fight to live.
The game would feature full interaction between npcs. Like, you can say anything you want to them and they'll reply every time. It'd still feature a suggested things to say to help progress the story though. It would also have advanced AI to the point of realism. It'd also have a full map of the world. If you want to go to New York and see what it would look like 200 years and an appocolypse from now, you can. If you live in Kentucky and want to see where you live, you can go there. It'd also boast full interaction with your surroundings. If you see a car, you can attempt to fix it and drive in it. Basically, it simulates real life in 200 years but post apocolyptic. Also, every player is connected through an online feature where you can meet up, hang out with, or kill any one you want. Oh, there'd be a quest line too, and I'm sure It'd be sick, I just can't think of one right now :3
Next, I'd sell all this stuff to the public for free since I have unlimited money and stuff. It'd be super awesome and, persay someone with unlimited money does read this, do this. I'm sure theres more I'd do, I just can't think of it right now.
Oh, I'd buy New Zealand because I'm sure testing something to take over your brain would kill a few people and people would be pissed and I'd get sued and stuff so why not make my own government and test on people there?
tl;dr I'd make a VR Simulator, make Real Fallout, make stasis, and live forever playing fun games that are real to me because unlimited money.