(In reply to nicolas from comment #5) > ==5476== Command: > /home/nicolas/.steam/steam/SteamApps/common/XCom-Enemy-Unknown/binaries/ > linux/xcom.sh -arch=x86_64 Looks like valgrind was run with the xcom.sh script as its argument, so it probably only monitored execution of the shell interpreter. I think you need to hook it into the xcom.sh script itself so it monitors execution of the actual game executable.