#1: CF - Crossfire
#2: Counter Strike 1.6
#3: Garry Mod
#4: Dota 2
#5: CS:GO
How the hell you have CS:GO
The only way to get it is
By TF2 items trade or on CS:GO free beta key that need your account to see if you have CSS and have play a lot of it or a gift from your friend