Many games have security systems that detect and prohibit users from running them in virtualized environments. An example is Themida used by MapleStory. This video attempts to show you how you can bypass some of those checks.

Link to VMWare Hardened Loader GitHub page (credit to hzqst for creating the tool and sharing it with us):
https://github.com/hzqst/VmwareHarden...

In the video, a registry key is referenced and is pasted below for convenient reference:

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968e32511cebfc108002be10318}\0000