The nebulous community is a Garry's Mod group that ran HL2RP and WW3RP servers, and at one point tried a DarkRP styled Experiment server that would have been fairly similar to Rust, as it involved bases and raiding with few to no rules. Their Rust server was a minor one, which was launched in 2017, but may have been interesting in seeing how a Gmod serious roleplay community took to the game, although little was said of it.

See the main article on the nebulous Rust server on the Gmod Archive:
nebulous Rust server

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