That’s what really happens to Cave Johnson?

I will never forgive Valve for what they did to Half Life and leaving the fans with an unresolved story do not play any Valve games until they make Half Life EP 3! send a message and vote with ur wallets

It seems I can't play with a keyboard, and the only controllers I do have with USB support (Pokken & Gamecube for Switch) are incompatible. What kind of controller can I buy that'll work with this game?

Do you think Valve will make something similar to this but for the Steam Controller/Machine when that releases next year, and would you like to see it happen?

When I open this on my steam deck it says this game has been optimized for play on the stream deck. Is there a way I can change this so I can play it using a controller on a monitor?