Unfortunately, it doesn't work on my Lenovo ThinkCentre i7 with 8 GB of RAM and Intel® Haswell Desktop graphics. When I run the executable, a window seems to open and closes immediately.

CQ6p3p3_Linux_Data and CQ6p3p3_Linux.x86 are in the same directory. Here is what I get when I launch it in the terminal:

moi@lenovo:~/Caver_Quest_6$ ./CQ6p3p3_Linux.x86
Set current directory to /home/moi/Caver_Quest_6
Found path: /home/moi/Caver_Quest_6/CQ6p3p3_Linux.x86
Mono path[0] = '/home/moi/Caver_Quest_6/CQ6p3p3_Linux_Data/Managed'
Mono path[1] = '/home/moi/Caver_Quest_6/CQ6p3p3_Linux_Data/Mono'
Mono config path = '/home/moi/Caver_Quest_6/CQ6p3p3_Linux_Data/Mono/etc'
displaymanager : xrandr version warning. 1.4
client has 4 screens
displaymanager screen (0)(VGA1): 1920 x 1200
Using libudev for joystick management

Importing game controller configs
moi@lenovo:~/Caver_Quest_6$

Unfortunately, this is beyond my capability to fix. But, you are not alone. The Unity forum reports a similar problem with the xrandr version warning. 1.4, reproduced below, from
http://forum.unity3d.com/threads/building-a-unity-linux-app-game-on-linux.370861/. Hopefully someone will post an answer soon.

One possibility is that some subroutines are still running, even though you closed the game. Several posting suggest this might be the
case. Perhaps reboot your machine and see if it works.