Episode 7: Stairs, Ladders, and Lifts | Level Creation Guide for Half-Life

TIMESTAMPS:
00:41 - 01:51 = Creating first step
01:51 - 02:30 = Creating stairway
02:30 - 03:11 = Making underneath stairway flat
03:11 - 05:46 = Adding invisible slope to remove bumpy effect
05:50 - 08:52 = Creating ladders
08:52 - 11:04 = Creating func_train entity for lift
11:04 - 16:40 = Creating path entities
16:40 - 20:33 = Creating func_button entity