The version of xgalaga shipped with the PowerTools is 2.0; the current
version is 2.0.34. Also, the package gives an out-of-date URL; the current
one appears to be:
There's an old libc6 contribs RPM that provides this version, which has
worked fine for me under RedHat for years.
i have already update to 2.0.34. It will go in the next rawhide release