3,476 hours in Garry's Mod mostly in singleplayer creating addons. I don't tend to play multiplayer or really play the game for what its worth, I just like creating interesting things and concepts in GLua. Would have a lot more if I didn't put 1,200 hours into VRChat. Opening Blender through steam also stops the counter for Garry's Mod for me so that's also another good chunk missing.