If you look to play the upcoming "Spectre Divide" game, don't hold your breath this is from an interview with Mountaintop Games CEO via The Verge.
c/steamdeck · u/mr_MADAFAKA@lemmy.ml · 57 points
*It’s only currently planned for PC, with no controller or console plans yet — and Mountaintop won’t necessarily allow Steam Deck to join. “Steam Deck is a concern as a cheating vector, and I think our anti-cheat systems may block it right now,” Mountaintop CEO and cofounder Nate Mitchell tells me.*
https://store.steampowered.com/app/2641470/Spectre_Divide/