(in Game Menu and Game Config) If STRACERUN is set to 1 steamtinkerlaunch will write a strace log of the launched game strace is launched with the commandline arguments found in STRACEOPTS.

When STRACERUN is enabled make sure /proc/sys/kernel/yama/ptrace_scope is set to 0. else your user will get access denied when trying to attach a process. Either echo 0 > /proc/sys/kernel/yama/ptrace_scope as root or enable it persistent in sysctl.