New to this game but registered to support the above post. Adding 3rd-party launchers to Steam doesn't give it the benefit of the platform's command line options. And - as sqroot has stated - even if it did, they would only be applying to the launcher. These commands unfortunately aren't even universally supported: "-nomansky" wouldn't do anything to CS:GO, for example (or any other Source engine title for that matter; notice how the linked "credit" thread is actually for ARK: Survival Evolved). Options are also prefaced by a + or - as well, so the first line "force-d3d12" shouldn't even include "force" at all to prioritize Direct3D 12 (... in ARK).