Rust

Rust starts you naked on a beach with a rock. Everything after that — the shelter, the workbench, the gun, the compound with automated turrets — is built by you, and can be taken from you by anyone with enough explosives. It is the purest expression of the survival sandbox premise and after a decade nothing has matched its intensity.

The game's real subject is other people. Servers develop politics: dominant clans, neutral trader groups, alliances that hold until they do not. Players build economies around scrap and components. Some servers have functioning courts. None of this is designed; it emerges because the stakes are high enough that co-operation and betrayal both have real consequences.

The hostility

It must be stated plainly: Rust's community includes some of the worst behaviour in online gaming, and the game's design — capture, restrain, and voice chat — makes targeted harassment mechanically possible in ways most games do not. Facepunch has added tooling over the years. The culture has not changed much. Playing solo on a high-population server means being hunted by groups with nothing better to do.

Which is why the recommendation is conditional on having a group. With four or five people, building and defending a base across a wipe cycle is one of the most engrossing things available in multiplayer gaming — genuinely collaborative, genuinely tense, and genuinely devastating when it goes wrong at four in the morning. Facepunch's decade of monthly updates deserves real credit for keeping it fresh.