In relation to Western devs, I think this is essentially just that it's easy to just pile in more assets, but it can be tricky slimming down again, because you need to be certain that something really isn't used before removing it. So many games never get around to the slimming down part, also because it isn't really directly profitable to them...

I will highlight 1 case though. Hitman 2 was 149 gig, and included the levels for Hitman 1 and 2. But Hitman 3 was slimmed down to 60 gigs while including all of the content from Hitman 1, 2, and 3.

Factorio with Space Age is 4 GB

My guess would be cod

TBF Maple story is 40gb today. The game is 2d.