There is also Rain World, which I am addicted for 3+ months now. It is also on sale, but before you buy it, know that you are going to die A LOT, but it really isn't a big issue; it's actually funny most times lol. Great lore too.
And one that I've rooted for a long time and I think flopped hard in its release is Below, but I very much still love it.
Also, one that I played for a bit last week and the soundtrack slaps hard is APE OUT.