The PlayStation Store takes a quantity-over-quality approach to deals, to the point where a "Spring Sale" doesn't necessarily carry as much weight as it would on other digital game storefronts, but this one is worth looking at, I think. I would've happily paid some of these prices for some of these games.
Sony is running the 2020 PlayStation Store Spring Sale until April 28, 2020. There are several hundred PS4 deals right now, and the lineup is going to change on April 15, so if nothing resonates, check back.
I've included the PlayStation Blog's list at the bottom of this post, but here's what stood out to me:
In particular, I have to give a shout-out to Journey to the Savage Planet, a sci-fi platformer adventure that scratched a "Metroid Primelite" itch for me. It's low-key one of my favorite games so far in 2020.
Oh, and if you're on a Doomkick, the original Doomand Doom II are $2.99 each. They never get old!