After all these years, and growing up with Windows 3.1, I have seen an entire evolution of computers and software. Touch screens and large resolutions were a pipe dream just 15 years ago. Now it's the norm. Going from a Packard Bell (yes, before HP) that couldn't run 3D Ultra Mini...
Increase the distance your melee weapons can reach as soon as you can.
You get more for melee kills, so make sure you keep running.
You want to be in front of the scientist at all times, clearing a path.