Hello to everybody.
Today i installed Linux Mint 18.2 and manually updated to 18.3 (did not have a blank DVD to burn image on),after that i updated the kernel to 4.13.0-26-generic (for the Meltdown/Spectre fix) and Mesa to 17.2.8.
Everything so far is great,had no problems whatsoever,until i decided to install Wine and play a little GTA:San Andreas.When i open the .exe file using the terminal it gives me the following error:

fixme:module:load_dll Loader redirect from L"wined3d.dll" to L"wined3d-csmt.dll"
fixme:d3d:wined3d_dxtn_init Wine cannot find the txc_dxtn library, DXTn software support unavailable.
err:wgl:init_opengl Failed to load libGL: libGL.so.1: cannot open shared object file: No such file or directory
err:wgl:init_opengl OpenGL support is disabled.

Wine version i use is "Wine-Staging 2.21".
glxgears give me a smooth 60fps experience with no lag or no fps drop.

My PC specs are:
CPU : Intel Xeon X5460 3.8Ghz
GPU : AMD R9 270 Stock
Motherboard: Gigabyte GA-EP35-DS3L
RAM : 8GB DDR2 800Mhz
SSD for "/" partition and HDD 1TB for "/home".

I searched on the internet but nothing seemed to work in enabling OpenGL in Wine games,also tried Warcraft 3 RoC&TFT,both give me this error : "Warcraft III was unable to initialize OpenGL.Please ensure you have OpenGL installed and that your display drivers are current"

Any help will be greatly appreciated.

From the research I've done on your issues it seems like the 32-bit openGL libraries are not installed.

Below are the key lines that indicate the most likely reason for your issues:

I know in the case of the NVIDIA proprietary drivers, if you install them using NVIDIA's own installer, it should ask you if you want to also install the 32-bit "compatibility libraries" - that's what I think you need in this case.

But if you have installed the video driver your system is using from packages instead, you would need the 32-bit packages for openGL instead. Just re-installing your video card's drivers by itself won't work.

I tried to search for the name of the 32-bit package you need, but I don't use Linux Mint myself, so all I can say is that, I *think* it is the 32-bit mesa package you need. You'll have to search your repo's and look for a package with libGL.so.1 it in - the 32-bit version of it.

Can you confirm which video card your PC has and post the output of the following commands:
(use CODE tags)