This question is based solely on curiosity. I have played a great many games on my PC over the years, and just now realized a trend across all games(most if not all). In the resources of the game, or in other words, next to the executable that runs the game, there are never DLL(Dynamic Link Library) binaries. This means that those games are created by statically linking to source files and dumping them all into the primary executable. I am certain that most of these game projects: Call of Duty, World of Warcraft, Splinter Cell, and [Include other arbitrary examples here], are utterly massive by scale and have hundreds of smaller children projects. I would probably not be wrong, either, in assuming that those same projects(such as API's, etc) could be packaged into a DLL instead of the obvious static linking. I apologize if it seems like I am rambling, but there is a point to this; it will be coming up soon. Next, I wanted to address the use of the games graphics API. Most games use DirectX, why is not relevant to this question; instead, it is how. Would I be safe to assume that said games are also statically linking to DirectX? And more importantly, why? Is there a logistical reasoning behind this inherently-conventional trait? Do game companies statically link all of their resources? And just again, why? Why not use DLLs instead?
Hopefully someone can answer this question, having been present or currently are present, working for an actual game company. Oh and I typed this all on my phone so I apologize for any errors.