WHere are my achievements???

Well, this morning, i started playing GMod, and all my achievements were reset!

The only thing i can remember doing this morning was deleting temp internet files, and my cookies.

Can anyone help?

They’re just achievements.

But no, i don’t know why they’re gone.

Yes, same thing happened to me, I installed two model packs, and started up single player, and got the achievement.

I was mad, but didn’t care too much, but I was like… wtf?