Garry's Mod is the biggest game of my childhood. I've spent hundreds (and I mean hundreds) of hours in multiplayer servers and having the best time of my life. I wish I could experience those times once again because they were the best memories I've had growing up. The chaos of staying alive while fighting hordes of player-controlled zombies in the Zombie Survival gamemode to having an all-out gunfight in Sandbox. I recommend this game to everyone who doesn't have it. Get you and your friends together, or even make some friends, on Garry's Mod and have a blast. There are numerous mods for any experience you can think of to enhance the vanilla experience.