Named Game of the Year by over 50 publications, Valve's début title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
does this fix the secret room?
Nah, this **** is nothing to do with original, not even a close.
Ground is flat, secret room is missing.
And rmf was created in 2003 year, so it's a old one.
I've released a better version: Moddb.com