I was looking at getting some roguelikes / lites (already have ToME, CoQ), unfortunately Cataclysm DDA is not on sale.
Krone Hotel at 90% off looks like a decent choice too. Then there’s Jupiter Hell, which I recently stumbled upon and looks great too.
I’d also like to get some of the FF games, though I’ve played VI, VII, IX and a bit of XII, it would be nice to revisit some of the older ones I haven’t played almost since the PSX era.
Stardew Valley is the GOAT. I’ve bought it 4 times (one for me and my ex on Android and again for each of us on PC) and would happily buy it again because it’s worth every penny.
I wonder if Stardew’s mods work on the Steam Deck? I’m not certain. But the game has amazing mods that completely change the focus of the game and add a ton of content.