Immersion.
That's it.
The thing that always drew me to GT was how it didn't feel just like a game where you race cars to win more cars to do more races. Certain other games like Forza, while looking beautiful, often feel like that to me. Playing GT (in particular the first four) always felt like you were viewing a portal into an entire world through your television screen.
I mean, think about it. I haven't come across someone that has played every GT and picks anything outside the first four as their favorite. (I'm sure they exist; please don't crucify me.) Why? It's not because of features; GT5 and 6 have more cars, more tracks, and more stuff (Course Creator, paint chips, PP, shuffle racing (RIP) and online racing in general, etc.). It's not because of graphics; GT5 and 6 look better than any of the previous GTs, thanks to the PS3 (Yes, even with Standards. Quit yer whinin'.). It's not because of the racing; while there's still room for improvement, GT's AI has steadily improved with each release, and grid sizes have finally broken out of the six-car cap in GT5 and 6.
So what's left? (Surely you don't like GT3 the best because of it's license tests?!) Nostalgia? I mean there's probably a bit of that involved, sure. But I'm an adult - I can fully admit when something I'm nostalgic for is worse than something currently out there, and am capable of criticizing a game series I've played since the beginning objectively. For some people nostalgia might be the biggest factor, but for me it's a non-issue. I can set all the great memories I have playing GT1-4 aside, and when I do my personal favorite is still GT4, with GT3 not far behind. Anyway, I digress.
If GT5 and 6 are better on paper in nearly every way (bugs/glitches, leveling and every other new feature that put people up in arms excluded), why do the series faithful not choose them as their favorite?
One word: atmosphere.
In my (only half humor-intended) opinion, there are seven essential ingredients to a Gran Turismo game:
1. Racing
2. Used cars
3. Gigantic encyclopedic car list
4. Light Japanese jazz fusion menu music
5. A Simulation Mode map whose layout resembles a city, not a bunch of buttons
6. Trial Mountain, Midfield, and Grand Valley
7. Moon Over the Castle
Execute the first five to the -nth degree and you basically have my gestating concept for my own perfect GT-style racing game.
Distill all seven to the most basic, non-humorous level and you get what I think is the essential formula for making a great Gran Turismo. Now let me explain how each of them has to do with atmosphere and immersion.
1. Racing
I mean, it's a racing game. Kind of needs racing. PD will sort out the rest, and I'm really fine with how they've done it so far (in every title). Sure the AI isn't the greatest, but it's really fine to me. This one doesn't have to do with atmosphere as much as an essential element of the game genre.
2. Used Cars
Kind of seems like an oddly specific criteria in a list of essential Gran Turismo elements, especially when several games in the series don't have them, but to me it's absolutely vital, and one of the main reasons I like GT4 more than GT3. When you have a used car market the game suddenly stops being a bunch of cars you can race, and transforms instantly into a living, breathing automotive ecosystem that you become a part of when you put the disc in for the first time. It's essential for the atmosphere and immersion formula that makes Gran Turismo what it is, and not a different immersive racing game. To me, buying your first used car for less than 10,000 credits is the defining moment in any Gran Turismo game. I was more than a bit insulted that I not only had no used car market to access, but was forced to buy a Honda Fit in GT6. Luckily that far in the direction that GT3 started by removing used cars seems like something PD won't try again.
3. Gigantic Encyclopedic Car List
This has always been Gran Turismo's other truly defining feature, from day one. GT1 single-handedly sparked my love for cars at a young age when I was gifted it by a friend who had no idea what to get me for my birthday one year, and it has done the same for many thousands of people (particularly youths) worldwide. I don't think there's another game that can say that. Not only the huge variety of cars represented, but the detailed descriptions and history of each model make a Gran Turismo game as much of an automotive museum as a racing game. In my eyes, having such a massive selection of vehicles to choose from and learn about is just as much part of the immersion of the game as the used car market is.
4. Light Japanese Jazz Fusion Menu Music
It's obvious that music is a big part of a game's atmosphere, and Gran Turismo wouldn't be Gran Turismo without the soothing jazz that plays in every menu. This is yet another thing I missed from GT6. Lose the rock guitar breaks...it's not Gran Turismo. I get that the modern youth likes that stuff (and I do too), but it's not right in a GT game. There's a specific GT atmosphere that needs a specific set of conditions to occur, and one of those is the specific style of menu music that has been with us ever since GT1. Granted, the US-market GT1 soundtrack is not the original jazz and the origins of so many tracks that reappear in later games (The Motorious City, Mr. 4WD, etc.), but it's still at least acceptably close. I always dug the Honda dealer music the most. And when you're playing GT4 and you notice that many of the tracks are secretly or not-so-secretly remixes of those original GT1 tracks it just turns up the atmosphere even further.
5. A Simulation Mode Map Whose Layout Resembles a City, Not a Bunch of Buttons
GT1, 2, and 4 got it right. GT3, 5, and 6 didn't.
It seems like a petty thing to focus on (again, on this essentials list), especially when half of the games released so far don't have it, but it's a big deal to me, and the feature of Gran Turismo that I expand wide open the most in my own racing game idea. I discussed immersion with the used car ecosystem and all of that, and the city menu really ties in with that so you feel like you're in an actual world, not just a bunch of flat menus. The all-present car and racing ecosystem that starts with the cars and racing is laid out visually via the city that only has automotive destinations in it. It takes every individual element of the immersion and atmosphere and manifests them all right in front of you to see. The world is visually tangible, and it is this menu that completes the immersion for me.
6. Trial Mountain, Midfield, and Grand Valley
Alright, I'll admit it - this one really isn't about immersion on its own. But for those who have been with the series for long enough, it kind of is. Can you imagine a Gran Turismo without its flagship original circuit, Grand Valley Speedway? Rather than say "all GT original tracks" as that wouldn't be strictly accurate as specific ones come and go, sometimes appearing in only one game, I picked the most obvious three. The clamor when Midfield was reintroduced should be enough to warrant its inclusion, and Trial Mountain is arguably the most classic Gran Turismo circuit. It's certainly the most dear to my heart.
7. Moon Over the Castle
For any game, immersion in the game starts in the intro. I've always liked GT's intros, so I didn't include it as a requirement because I know PD will deliver. But you can't have a GT game without Gran Turismo's theme. One of my only gripes with GT4 is that it went to Panama after the orchestral MOtC intro. It worked great with the intro (that intro is my favorite of the series), but it wasn't Moon Over the Castle. As long as it's a great version of the tune (even the GT4 Orchestral Version), I'm happy, and the immersion starts immediately.
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That's a lot of explanation for a one-word answer, but I felt the need to clarify exactly what I meant and I hope it came across. (And my sincerest apologies to anyone who read all of that.) If PD just focused on the things that made the best Gran Turismos great, they would have a winner. And to me, #1 of those things is immersion.
I do think that the event shakeup being discussed above me would be great as well, but I can only hope for so much from PD at once, and I still like the old formula so I focused on that.