Free Game Deals

Counter Strike: Global Offensive (Free) (Permanently I guess)
Just put it in your library just in case if they made it un-free
https://store.steampowered.com/app/730/CounterStrike_Global_Offensive/
Ye you are right ye its permanent thanks for posting
Also :

Free ( permanent ) offer ends 1 day 3 hours from now )
Lego : The hobbit
https://www.humblebundle.com/store/lego-the-hobbit?partner=igb

Free weekend ( temporary )

The Crew 2
uplay or https://store.steampowered.com/app/646910/The_Crew_2/

DayZ
https://store.steampowered.com/app/221100/DayZ/

Street Fighter V ( its 5 days free )
https://store.steampowered.com/app/310950/Street_Fighter_V/

Hero Siege
https://store.steampowered.com/app/269210/Hero_Siege/

The King of Fighters XIV
https://store.steampowered.com/app/571260/THE_KING_OF_FIGHTERS_XIV_STEAM_EDITION/

Kabounce ( its 6 days free )
https://store.steampowered.com/app/431930/Kabounce/