Feral Heart

Yes, Feralheart is indeed safe to Download and run.It all comes down to your computer/laptop if you will recieve lag or some glitchy problems. FeralHeart itself is fine, but sometimes your computer will run slow on it. Sometimes, I'd have to re-download FH because of a glitch that happens on my laptop, but honestly for the 3 years i've had it its never sent a virus or hack in my laptop.
I own a sony vaio.
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This happens to me usually.What you should do,is try re-downloading the game.Its more-likely to be your computer,not being able to handle loading all of FeralHeart.Have you tried using a different computer/laptop? That would do the trick.You may want to delete a few things on your computer,so it would be less likely to lag off.Go to control panel,and then you can see all the things you've downloaded,to see how much they've taken up.

~Hope this helped.