I think it depends what map/(World…) you are in and what addons you have installed
It’s like your own customizable Matrix, Its all up to the user / server.
E.g In the matrix, The humans think that the year is 2000 when its closer to the year 3000.
Just putting this out there:
Imagine if there was a HL2 Multiplayer Co-op, no addons just good old Hl2 with more players
The combines would get pwned so much. =3