I've been enjoying Signalis. It's a survival horror game with a top down 2.5d perspective and a late ps1-early ps2 graphics style. It's very reminiscent of the older Resident Evil games where ammo is scarce(more or less is available based on difficulty), inventory space is limited(adjustable limits are available in settings), and there are specific rooms with a storage container where you can store items and save your game (there is no autosave or checkpoint system; you have to manually save your game), but it very much feels like it's own thing.

I picked it up on a whim when looking for games with female protagonists to play on a new-to-me hand-me-down Steam Deck, and it happens to run perfectly on it.