Sprinting:

Sprinting is not that useful on stairs; save it for level surfaces

Guns:

It is best to save all guns for fights against multiple enemies or an exceptionally tough enemy Particularly weak enemies can be finished off with a combination of the Taser and kicks instead

Big melee weapons:

To use big melee weapons effectively practice hanging back then veering ahead far enough to hit your enemy with your weapon Then drift back This makes the most of your weapons' superior reach and keeps you away from your opponents' faster weapons

Strategic dropping:

Drop important weapons and tools near distinctive objects or in easy-to-find spots By doing this you will not have to search for them later