- Left 4 Dead (the original)
I honestly don't think L4D1 will be ported. Why? Because L4D2 has all the maps and characters as the first just with different gameplay mechanics. Also, I don't think L4D1 is that popular anymore for the above reasons (Please correct me if I'm wrong).
Yes I would love to see another game on Linux, but if the technical side outweighs the practical, why bother?
I'd rather see portal 2 and CS:GO before L4D1 in any case.