rvolland you can't access Linux binary files these files contain compiled source code. is the game client working? if yes that's set, if not there's a program called Wine which allows you to run .exe files by translating Windows API calls to calls your Linux kernel can understand.To run a .exe program you first need to install Wine.
To do so you can follow the Official Wine installation tutorial for Ubuntu
But I tried client on Linux and it works fine.
If I understand wrong please correct.