Hi, I followed your steps but I can't play it. after I clicked play button on steam, I got popup error,so I debuged and this is the result
[04/13/18 05:42:34] - Running wine-2.21-staging SniperV2Launcher.exe (Working directory : /home/tux/.PlayOnLinux/wineprefix/SniperElite2/drive_c/Program...