If some computer games are 3D, is the real world 4D?

Answer 1

No computer games are actually 3d.  They are a 2d representation of a 3d virtual world.  Referring of course to three LINEAR or SPATIAL dimensions. We live in an actual world with three spatial dimensions.  Not four.

Answer 2

The real world is 3 dimensions with the 4th being time to add motion.

Answer 3

String theory says 10. We normally think of 4 with the last being time.