Hammer Tutorial #23 Stairs, Arches, and more! - YouTube
Article] Stairs and your map. | TF2Maps.net
CS 1.6 Modding
L4D Level Design/Level Organization - Valve Developer Community
I have a metal staircase, but when it's walked over, it doesn't make metal footstep sounds because of the player clip. Any alternate way to create a metal staircase in which the
multimedia @ VU
L4D Level Design/Level Organization - Valve Developer Community