Rust is one of the most influential titles in the history of PC and Early Access, and while its hardcore gameplay and toxic community make it unsuitable for some, I fully recommend it for those who can put in the hours needed to succeed.
Although innovative, Darwin Project failed to attract a sustainable audience before and is essentially dead on all platforms.
Spacelords is weirdly sexual to the point of being distracting, and I feel this aesthetic is largely responsible for its low player count and lack of wider community acceptance.