The game is very poorly optimized. It launches with limited graphical options, capped at 30, and no way no to uncap from the ingame menu. The issue is the ingame limiter has consistent framepacing issues and looks like a stuttery mess. The way to fix it is to use the launch command "SteamDeck=0 %command%" (without the quotation marks) to unlock the fps and then use the Steam Deck's built-in framerate limiter. The game is playable at 40 using medium settings and 30 using high settings, but expect the framerate to tank to the low 20s occasionally.

I've had better performance on some recent AAA games, so this one is surprising to say the least, but it's playable nonetheless after some tinkering.