Hey there! I've been playing South Park: Snow Days on the Steam Deck and it's running really well. Although, I did need to tweak a few settings to optimize it. It's pure chaos and absolutely hilarious.
Technically, it can run on high settings with motion blur off, v-sync off, and frame rate smoothing on. This setting really makes a huge difference and you'll see that in cut scenes. I was getting 50-60 frames per second with regular dips into the 40s. However, in some of the hefty combat scenes, it did dip into the 30s.
I noticed that we are almost at 23 watts on the Steam Deck OLED, which means we are pushing the battery time down to around 2 and 1/2 hours at the absolute max. Because of those dips, I recommend bringing the settings back down to medium, which actually pushed the game up into the 50s and 60s for the most part. Although, it doesn't save that much battery in most circumstances, it does feel a little smoother.
It's a graphically intense game with so many effects going off, but if you're a fan of the South Park series, the quips and the voice-overs from the characters will keep you laughing as you make your way through the game. Some of the combat can be a little bit trickier, especially with some dodgy camera angles, but it's still fun to play.
The great news is, for those wanting to play this on multiplayer, you have full party play. You can play up to four players in co-op or join public matches, and it's all working perfectly fine. It's definitely worth jumping into if you just want a good old blast or fun frantic action without having to worry too much about being serious about the way you're playing.