I thought those of you wanting to try these out might find this useful, so I decided to link to all the present, known Creepypasta/SCP related games below. If I've missed any, please feel free to add more! 
Please note that I haven't played all of these, so I can't vouch for the awesomeness of one or craptacularness of another. Will add more as they come 
Enjoy!
--------------------
SCP: Containment Breach (survive a facility full of SCP's) - Download
SCP-079 (Text based. "The AI" Username/Pass required: Username: *any* - Password: scp420) - Download
SCP (Text based. 079-inspired. Choose to "logout" for the fun to begin) - Download
SCP-087 (The original Stairwell) - Download
SC-087-B (The second version, this time will moar hallways and terror) - Download
SCP-087-C (Third version. The creepy circus) - Download
SCP-087-D (Fourth. I don't even...) - Download
SCP-087-D (another version. Look, rainbows) - Download
[REDACTED] (also known as "E") - Download
Slender Man's Shadow (a collection to choose from based on your setting of choice) - Download
Slender (Find the 8 manuscript pages) - Download
SlenderMod (full remake of Slender) - Download
Slenderman (released prior to Slender, different game) - Download
Slender 2D (browser-based game) - Download
Lavender Town's Gym (Pokemon Creepypasta) - Download
Pokemon Ghost Black (and again) - Download
UPCOMING:
Faceless - A Slenderman mod built on the Half Life 2 engine. Currently being voted in on Steam Greenlight. (VOTE HERE) - Faceless
SCP: Wander - An up and coming browser game pitting you against the creatures of the SCP Foundation. Currently an alpha-only, browser version is available for people who sign up for an Alpha key on the website: Wander
Six-Eight-Two - In the works, first-person shooter horror survival mini-game based on SCP-682 - Six-Eight-Two
SCP: New Horizon - Upcoming game, not much known aside it being about the Foundation and made with the Unity game engine - New Horizon
Site 37 - Still in developing stages. But it looks fantastic! - Watch Here
Please note that I haven't played all of these, so I can't vouch for the awesomeness of one or craptacularness of another. Will add more as they come Enjoy!--------------------
SCP: Containment Breach (survive a facility full of SCP's) - Download
SCP-079 (Text based. "The AI" Username/Pass required: Username: *any* - Password: scp420) - Download
SCP (Text based. 079-inspired. Choose to "logout" for the fun to begin) - Download
SCP-087 (The original Stairwell) - Download
SC-087-B (The second version, this time will moar hallways and terror) - Download
SCP-087-C (Third version. The creepy circus) - Download
SCP-087-D (Fourth. I don't even...) - Download
SCP-087-D (another version. Look, rainbows) - Download
[REDACTED] (also known as "E") - Download
Slender Man's Shadow (a collection to choose from based on your setting of choice) - Download
Slender (Find the 8 manuscript pages) - Download
SlenderMod (full remake of Slender) - Download
Slenderman (released prior to Slender, different game) - Download
Slender 2D (browser-based game) - Download
Lavender Town's Gym (Pokemon Creepypasta) - Download
Pokemon Ghost Black (and again) - Download
UPCOMING:
Faceless - A Slenderman mod built on the Half Life 2 engine. Currently being voted in on Steam Greenlight. (VOTE HERE) - Faceless
SCP: Wander - An up and coming browser game pitting you against the creatures of the SCP Foundation. Currently an alpha-only, browser version is available for people who sign up for an Alpha key on the website: Wander
Six-Eight-Two - In the works, first-person shooter horror survival mini-game based on SCP-682 - Six-Eight-Two
SCP: New Horizon - Upcoming game, not much known aside it being about the Foundation and made with the Unity game engine - New Horizon
Site 37 - Still in developing stages. But it looks fantastic! - Watch Here
