Running Steam on deepin 20.7.1 64-bit
STEAM_RUNTIME is enabled automatically
Pins potentially out-of-date, rebuilding...
/usr/bin/zenity: error while loading shared libraries: libgsttag-1.0.so.0: cannot open shared object file: No such file or directory
Can't find 'steam-runtime-check-requirements', continuing anyway
WARNING: Using default/fallback debugger launch
/home/yixuan/.local/share/Steam/ubuntu12_32/steam

解决方法

安装 libgstreamer-plugins-base1.0-0