Zak Da Mack

Keep your weapon at high ready, don't lower it or you are going to slower to react. Breach rooms with team mates and when you enter go different directions so you aren't vulnerable to be attacked from behind or your sides as soon as you go in. Try to be aggressive, use stealth to your advantage where possible, preferably use mid or low caps!

As already said, pack light, you need to move quick. Make sure you take a torch, unless your sure there are no dark areas. Have fun.

Don't gagglefuck the doorways and choke points. Don't be afraid to get stuck in (it only hurts a little bit, what are you afraid of?) Don't assume you'll have anything like the range or time to react that you do in the great wide outdoors. If you have a pistol, make sure you can get at it quickly and easily and be prepared to use it in the tight spaces.

Anyway...where are you playing?