Slime Rancher

Monomi Park created the most joyful first-person game ever made. You're Beatrix LeBeau, a rancher on a distant planet who farms adorable slimes — feeding them, vacuuming them into pens, combining them into rare hybrids, and selling their "plorts" for money. The slimes bounce, purr, and smile at you with the enthusiasm of a golden retriever. The color palette is pure serotonin. Slime Rancher sold over 7 million copies, making it 40% more popular than the runner-up in its genre on Steam, and the sequel expanded the formula with co-op. It's the game equivalent of watching cute animal videos, except you're the one feeding them.