Wine uses the Win32 API, which makes over 10,000 library calls, for centralizing compatability with Windows software. It can run many Direct X games, from the first Direct X, to Direct X 11. It can even run old Dos games, something that Windows has long time abandoned, although more recent versions of Wine have stated that Windows 1.x and 2.x compatability has been dropped, but older versions of Wine can still run them. Wine ensures good backwards compatability with Windows applications. Wine can mimic different Windows versions in order to ensure full compatability. Wine has native 64-bit compatability with many Windows software, as well. Wine has a few sister projects, the most popular one being PlayOnLinux, which is a GUI front end for Wine that makes it much easier to use Wine's advanced features. Wine does not only run on Linux, but is also implanted in the ReactOS project and has ever been a big part of development for Wine.

I'd just like to interject for moment. What you're refering to as Linux, is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux. Linux is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.
Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called Linux, and many of its users are not aware that it is basically the GNU system, developed by the GNU Project.

Why is Wine so great?
Did you know Wine stands for "Wine is Not a Emulator"? Probably.

Wine is, has been, and always will be the central compatability layer for all Unix and Unix-like systems that is capable of running Windows software and games on it. Incase you didn't know, Wine actually got it's name from "Windows Emulator" until later in the future where it's meaning got shifted to a recursive acronym, in order to preserve the history of Wine, without changing it's identity. Wine's name is referenced by the fact that no processor code execution emulation occurs when running any Windows application. In a 2007 survey, there were more like 38,000 Linux desktop users that were using Wine. Wine utilizes the Win32 API and is capable of running anything from the DOS era, to Direct X 11 rendering techniques. Wine's first inital release was in July 1993 and it's most recent version release, 2.0, in January 2017.

I'd just like to interject for moment. What you're refering to as Linux, is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux. Linux is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.
Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called Linux, and many of its users are not aware that it is basically the GNU system, developed by the GNU Project.

https://www.youtube.com/watch?v=7t96m2ynKw0

Why is Wine so great?
Did you know Wine stands for "Wine is Not a Emulator"? Probably.

Wine is, has been, and always will be the central compatability layer for all Unix and Unix-like systems that is capable of running Windows software and games on it. Incase you didn't know, Wine actually got it's name from "Windows Emulator" until later in the future where it's meaning got shifted to a recursive acronym, in order to preserve the history of Wine, without changing it's identity. Wine's name is referenced by the fact that no processor code execution emulation occurs when running any Windows application. In a 2007 survey, there were more like 38,000 Linux desktop users that were using Wine. Wine utilizes the Win32 API and is capable of running anything from the DOS era, to Direct X 11 rendering techniques. Wine's first inital release was in July 1993 and it's most recent version release, 2.0, in January 2017.