Other games usually don't use that many bones, or they don't use bones at all (like LA Noire).
Eyeball raycasting is probably not what you think it to be, as in not related to the rendering. They most likely use it only to determine the rotations, particularly during gameplay where it has to be dynamic. Even Quake 3 and Half Life 1 had such features.
I don't see refraction on the eyes and the reflection is probably a simple environment map. There is some shading going on with the iris of Drake's eyes but it could just be painted in the texture.
Eyeball raycasting is probably not what you think it to be, as in not related to the rendering. They most likely use it only to determine the rotations, particularly during gameplay where it has to be dynamic. Even Quake 3 and Half Life 1 had such features.
I don't see refraction on the eyes and the reflection is probably a simple environment map. There is some shading going on with the iris of Drake's eyes but it could just be painted in the texture.