Quote:An elaborate scam is underway that pretends to be a free game giveaway site, but instead hacks a user's Steam account, takes control over it, and then incorporates the new victim into their attack by targeting other players. 

The scam works by attackers hacking into Steam accounts and sending messages to the victim's friends that they can get a free Steam game by going to a site and entering a promo code. 
 

Steam message promoting scam site 

When a user clicks the URL they will be brought to the URL FREE GAMES, which will then redirect a user to one of the attacker's currently working scam sites...