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Sometimes when you launch a game you have to choose between different launch options:
Is it possible to configure Steam so the startup window is skipped and a specific options is chosen?
I my case I want Kerbal Space Program to always launch in 64-bit mode, otherwise the game crashes (because of mods).
NOTE: I mentioned Kerbal Space Program as an example, but the answer should be valid for any Steam game.
I'm not sure there's a way to do that in Steam directly, but you could always create a desktop shortcut to the 64 bit KSP .exe file in the local files and launch it that way. There might be a way to do it from the "Launch Options" command line in the game's Properties, but I don't know offhand.
In your steam Library, right click KSP, press Properties, then Set Launch Options at the bottom. Type the following text into the box and press OK:
"C:\Program Files (x86)\Steam\steamapps\common\Kerbal Space Program\KSP_x64.exe" %command%
(note: if KSP is installed in a non-default location, you will need to edit the path above to match your installation. For instance, I have the game installed on my seconday hard drive under D:\Steam Library)
This is not possible with Steam itself, until they make this functionality easily accessible in an update (along with so much other stuff like skipping updates that's hidden but possible), but it's already been so long it seems like they don't plan to make it publicly accessible.
If the app still works (with no updates since 2020), SteamEdit can do this easily. It modifies a binary VDF (Valve Data Format) file to inject data, so it may trigger security software. It also requires rebuilding the file after occasional updates from Steam. The app is closed-source, but it decompiles pretty well as it's built with C#.
