I've loved the SCP Universe for a few years now and I've been looking for a good rules-lite system for it, and I think I found it in Fari RPGs' Breathless System. The game is lite, so it's only a very basic primer on the whole SCP Foundation and Universe, but it's a good place to start and I'm happy with my initial results! Looking forwards to feedback and I'm planning on some companion games for the GOC and Serpent's Hand too.