Agent_KaryoYou can finally rescue Half-Life's guards and scientists thanks to this mod inspired by Lemmings
Half-Life: Lemmings lets you save the trapped employees of the Black Mesa: Facility.
Trailer:
I actually tried to do this in the OG GoldSource, but I could never get them to move to the next map. This on the early maps (office complex), I was too busy in later maps.
QuetzalcutlassThe furthest you can bring them in the base game is that part with the falling elevator. I had like 7-8 NPCs following me when I reached that spot.