Diablo II's a multiplayer hack-and-slash RPG from 2000. It's on PC, but not Steam, and there's a Mac release. No Linux support though.
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{"name": "Diablo II", "release_year": "2000", "genres": "hack-and-slash, role-playing", "has_multiplayer": "yes", "platforms": "PC", "available_on_steam": "no", "has_linux_release": "no", "has_mac_release": "yes", "intention": "inform"}
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