Proton versions over time
Launch lines, newest first
PROTON_LOG=1 PROTON_NO_ESYNC=1 PROTON_USE_WINED3D=1 %command%
%command% PROTON_USE_WINED3D=1
PROTON_LOG=1 %command% PROTON_NO_ESYNC=1
ENV_VARIABLE=foo OTHER_VARIABLE=bar %command% -gameoption
PROTON_NO_ESYNC=1 %command%
PROTON_USE_WINED3D=1 %command%