Totally crazy modification made by russian G-Man fans or... err... haters! XD Featuring: G-Mans (g-men?) are EVERYWHERE! They're invading our dear planet and trying to kill you... And now... YOU CAN KILL THEM! Yeah! :) But don't be surprised when you see their appearance... He-he... >: ) Flying G-Mans, cyborg G-Mans, monster G-Mans, alien G-Mans... Should be compatible with any HL version. Have fun!!
This review may contain spoilers
In Half-Life's storyline, The "Gman" is a mysterious person who seems to follow the character you play like a owl. The Gman is even more interesting in this mod.
Gmen are everywhere in G-Man Invasion and They are taking roles as Soldiers, Scientists, Aliens, Robots/Machines, and Security Guards. The weapons have all been changed to a more "Gman" style (like his suitcase) and Gman riding snarks.
The mod does not feature any new maps but the titles have been changed in the Titles.txt to represent the Gman, The mod is only singleplayer but for a mod like G-Man Invasion, It gives you many laughs.