Heckler & Koch. A few of the HL2 weapons are based on real weapons made by H&K

No. The open source drivers are better at almost everything. The only reasons to use the propriatary one is if you need some OpenCL improvements of if you are using a Radeon Pro GPU. For normal usage and gaming the open source driver will offer more performance and better compatibility.

What’s wrong with world? (serious question) I know that ml has tankies and such but I’ve never heard of issues with world.