Before i'm going to reply, you got the achievement
Addict

You have wasted a year of your life playing GMod!

on 4 aug

and the achievement

One Week

One whole week of your life wasted

One Month

One whole month of your life wasted

Both on 4 aug, how did you get year/month/week in one day? With 300 hours of playtime.

Before i'm going to reply, you got the achievement Addict You have wasted a year of your life playing GMod! on 4 aug and the achievement One Week One whole week of your life wasted One Month One whole month of your life wasted Both on 4 aug, how did you get year/month/week in one day? With 300 hours of playtime.