It is quite a bit more fake than that.
Fist off, the F-16AJ in game is based on the production model F-16A Block 10. This is the same model that was proposed to Japan in the first F-16J proposal that was competing with the F-14 and F-15.
However, despite seemingly representing the first proposal, the aircraft in game is able to carry radar missiles on the inner underwing missile pylons. This was not a capability of the F-16J.
Second, the F-16AJ as a distinct name is only part of the second F-16J proposal, that in the brochure differentiated between F-16AJ and F-16BJ. This is not the same proposal, as we know the first was denied for lack of radar guided weaponry, which were included in the second proposal (albeit too late).
This proposal also differs a lot from the aircraft in game, as it is instead based on the second YF-16A prototype, instead of an F-16A Block 10 airframe.
It also included its experimental Sparrow mounts. Most prominently were the landing gear door mounted hardpoints, however all underwing missile pylons and the wingtips were also shown in the brochure to mount them.
And lastly, TV guided bombs (likely GBU-8 as seen on the US F-16A Block 10) were also advertised in the brochure.
But all of this is technically irrelevant, as it is actually nether two proposals. It’s based on a Gaijin imagined what-if scenario where Japan decided to adopt the F-16AJ over the more capable F-15, but somehow decided to downgeadw it for the sole reason that other F-16 users were content with the basic F-16 performance. Gaijin actually put out a whole disclaimer about this when it was released.
I personally find their what-if quite a bit unrealistic though, considering the only F-16 derivative Japan ever accepted was the already very much improved SX-3, which itself was then improved quite extensively into what is now the F-2. But apparently Gaijin knows better and Japan just wants a standard F-16 with two Sparrows over the F-15…