The map pack is called “Half-Life 2 but G-Man won’t leave you alone (Demo)“ and it’s by Anachronistic ALLOS. In this demo you will face the G-man as he hunts you down across classic half life 2 locations briefcase in hand.
it began as a Youtube video with the same premise and the video had quite a great response encouraging the author to make it a playable thing for everyone to enjoy. :D
The parkour mod used is Beatrun by datae.
Tags: #garrysmod #gmod #beatrun #freerun #halflife2 #halflife #mods