Transitioning from Half-Life 2 (HL2) to Garry's Mod (GMod) is less like playing a sequel and more like stepping through a broken wall into a chaotic multiverse. GMod is built on the "Source Engine" (the same engine as HL2), so the content is deeply interconnected.
The HL2 asset pack allowed for community-driven multiplayer modes that had nothing to do with Valve’s original vision: half life 2 gmod content
allow you to play the entire story with up to 64 friends, though performance can vary on crowded servers. Technical Quirks Transitioning from Half-Life 2 (HL2) to Garry's Mod
: In HL2, the camera follows your character; in GMod, it follows your ragdoll. Broken Scripting the camera follows your character