On amd64, ut2004-demo fails with the following error: madmax@wintermute ~ $ ut2004-demo ./ut2004-bin: error while loading shared libraries: libstdc++.so.5: cannot open shared object file: No such file or directory Installing sys-libs/libstdc++-v3-3.3.6 fixes the situation.
*** This bug has been marked as a duplicate of bug 206050 ***