Basically a collection of addons that make gmod actually feel and look like half-life 2, ill update this collection wheither there are more addons that add hl2 styled things to gmod

Bonus commands to make things more like hl2:

sv_defaultdeployspeed 1: Sets the weapon deploy speed to that of Half-Life 2.
hud_deathnotice_time 0: Hides the killfeed.
sv_gravity 800: Makes gravity higher.

for people that use a speed changer addon:
Walk speed = 150
Run speed = 320