To fix the "Unable to launch game" error in SmartSteamEmu, you must manually configure the SmartSteamEmu.ini file to correctly point to your game's executable and its directory. This error typically occurs when the paths are incorrect or contain unsupported characters. Step-by-Step Fix
If SmartSteamEmu.exe is inside your game folder: To fix the "Unable to launch game" error
.exe is at D:\Games\GameName\Game.exe, then StartIn = "D:\Games\GameName".exe is at D:\Games\GameName\Binaries\Win64\Game.exe, try StartIn = "D:\Games\GameName\Binaries\Win64" first. If that fails, use StartIn = "D:\Games\GameName".SmartSteamLoader.exe directly from this folder. Do not make a shortcut yet. If it works, the error is resolved.