- I present to you ProtonDB! This game is rated as Platinum so should run nicely on the deck (with the exception of some cutscenes.) You might have to edit some things as well to get it to run at first.Starship Troopers: Terran Command ProtonDB Rating
As for controls, you'll definitely be using the trackpads and triggers for mouse inputs but since it's Steam, you can always alter it to your preference.
In regards to the cutscenes, looks like if you install Proton-GE then you should have everything working. I've never installed it myself but a lot of people have. It sucks that Valve can't ship their SteamOS with proprietary codecs for a lot of these videos but I get it. They're abiding by the GNU licenses.