Strict NAT in Torchlight 2 & Dead Space 3

There is a good possibility you are receiving the strict NAT type because of your service provider. I used to have strict NAT on everything I played and when I moved and got a new provider with no changes everything says open NAT now.

You could try DMZ briefly to see if that fixes the performance in Torchlight 2. It is possible that your network performance issues are not related to this problem for Torchlight 2.

For Dead Space 3, I don't have an answer to provide.

Note that using DMZ is a potential security vulnerability so if you have to use it, you should only turn it on when necessary.