The Main Tech Movement: Strafing increases your overall speed and lets you outrun every monster allowing you to survive and run past most things.

Pistol: The pistol can be reload canceled by aiming in after around half of the reload animation completes, then you can freely start shooting again. Their is a mag extension in the Police Station on the left after the first area in between the bench's. The pistol also doesn't have a fire rate cap letting you blast anything big.

Shotgun: The shotgun can do very high dps but reloading is extremely slow compared to other guns so try to setup the reloads while your interacting with radios or computers.

Rifle: The rifle is able to handle the bugs much easier than the pistol, you can also do the reload cancel on the rifle allowing for much faster reloading. The one problem with the rifle is for when your first acquire it you have an animation of pulling out the stock which stops you from shooting so make sure your doing it when you don't need to kill anything.

Grenades: The grenades are currently bugged, however when they worked they basically one hit the spider and since 3 of them are possible to gather you could also use them to handle the humanoids. They can be used to really quickly clear out the first part of the Train Station making it much faster.

Knife: The Knife Seems to not do any damage currently.