Hello Planet Minecraft, here's an old horror/adventure map I created a while back, based on the infamous SCP: Containment Breach.
The map was made around the 0.4/0.5 update for SCP: CB, so the areas in the game are severely outdated. However, it's still a fairly large facility, and there's tons of hidden goodies throughout.

Few rules:
1) Keep a low draw distance. Certain areas may look weird. Keep the draw distance around 2-4 chunks for best results.
2) 'Moody' lighting. I made the map a little too bright to keep bats from spawning. However, with moody lighting, the map looks signifigantly better. Trust me.
3) No Creative mode. Don't. 
4) Peaceful mode. Lots of dark areas in this map. You do NOT want mobs popping up in random places.
5) Bats. Due to a recent update, bats could be a potential problem. Please use this command to counter-act this problem: /gamerule doMobSpawning false . You might have to start a LAN server to enable cheats, however.
 
Preferred Texture Pack: Coterie Craft

Note: There are a few dead-ends and discrepancies between this map and the actual game. However, I tried to color some of the rooms appropriatly to their in-game counterparts, but due to the age of the map, some rooms will not be appropriately zoned.

Also, I must give credit when credit is due. This map is a HEAVY modification of an older map. Check it out here: http://www.planetminecraft.com/project/scp---containment-breach-minecraft-map/