Double Fine's Rad, published last year to critical acclaim, is going for pretty dang cheap right now over on Humble Bandai Namco Bundle 4. The average price keeps changing, but currently anything above €8.60 gets you Rad plus a slew of other games, including an entry in the Katamari Damacy series. It's never been more affordable.
Rad is an isometric roguelike about a hero searching a post-apocalyptic wasteland for "respirators," which may restore civilisation in the wake of an apocalypse. Feels prescient. I haven't heard whether there's a pitchfork mob high on hydroxychloroquine out yelling something about reopening the economy despite it killing people, but you can let us know if there is by trying the game yourself.
Source: Humble Bundle