Anyone can make a Creative Commons game using SCP's theme, but no one has done it yet. So, I offer the following stand-ins or re-mixable options
  1. Secret Unknown Stuff: Escape from Dulce
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    [REDACTED]
  2. Ancient Terrible Things
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    Probably the most directly SCP-inspired game out there. It's basically Call of Cthulhu meets Johnny Quest, without [REDACTED].
  3. Betrayal at House on the Hill
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    But only with the sci-fi-ish betrayers.
  4. Level 7 [Escape]
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    A typical containment failure scenario.
  5. Cthulhu Fluxx and Fluxx Blanxx
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    With the Blanxx DIY'd to reflect SCP [REDACTED].
  6. 1000 Blank White Cards
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    The quick and cheap DIY option.
  7. Fiasco
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    If you want to play up the pitch black humor, Fiasco and SCP Foundation go together like [REDACTED] and [REDACTED]. You have to make your own playset, but those aren't hard.
  8. Dread
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    Maybe the only RPG that can do something comparable to a jump scare.