While the base game isn't free, you can still get your FNaF fix or save money through these official channels: Five Nights at Freddy's: Security Breach on Steam
You click "Generate Key." A pop-up says, "Verification Required. Complete one survey to prove you are human." You then enter your phone number or email address. You are then charged hidden subscription fees ($50-$100 per month) for "premium SMS services." You never get the key. fnaf security breach free steam key