Here are all known links related to the Streets of Rogue community space.
I will keep this post updated as much as I can.
(Last Update 24.04.2021)
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Official
(The game itself - available for purchase on Steam)
(Streets of Rogue Discord server)
(talk with other players, modders, map makers, share content!)
(Reddit community for Streets of Rogue)
(Great place to signal boost any releases or other news you have for your custom content!)
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Custom Content
(characters, chunk packs, campaigns)
(Steam Workshop - the #1 place for getting custom content)
(GOG friendly method to get mods from the Steam Workshop)
(ModDB - a long-lasting place to share custom content, anyone can upload here)
(Both GOG and Steam users can get any content uploaded here)
(Bonus: With news posts for releases or progress reports, you can even get showcased on the FRONT PAGE of ModDB - massive visibility! Be sure to include images and effort!)
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Modding
(Gamebanana - many modders/tool makers post their SoR content here)
(How to install mods - quite important!)
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Guides
(Official Level Editor usage introduction video - 9 mins)
(The Ultimate Custom Content Guide - Characters, Chunk Packs, Campaigns)
(Advanced Chunk Pack making guide)
(Modding guide - requires programming knowledge!)
(Addendum to the modding guide - answers some questions that may arise after)
(SoR Discord community will also help with further questions - be sure to visit it!)