Don't Starve is brutal but super addictive. The art style is awesome, and it's that perfect mix of "just one more day" and "oh crap, why is everything trying to kill me?!" Trying to scavenge for supplies, build a camp, and keep those sanity-draining monsters at bay is crazy tense, but in a good way. It's tough as nails, especially for beginners, but the challenge is what makes it so satisfying when you finally start to thrive.