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.
Both ToME and Caves of Qud are amazing games. You can get ToME for free off the official website
https://te4.org/
look into some of the community made controller templates, as there are a lot of keybinds to cover it could be easier to use a template as a starting point.