Vice City was released nearly 25 years ago! Also it's a game, so it's not really an apples-to-apples comparison. If you count the unique 'features' (or systems) of Vice City, you might find it's a comparable count to the number of features of a medium-sized mobile app.
The physics of the car tires in vice city by themselves outweigh 99% of all apps in terms of complexity and features…
I feel you need to clarify which mobile apps are "medium-sized" for you, because if we just interpret this comment literally it's just laughable.
You are joking right ? renderer, audio, math, physics, animation, AI, asset streaming,.... in addition to the gameplay itself, and you compare it to a medium-sized mobile app ???