Vibrating subtitles:  Enter UNDONE!! as a case-sensitive profile name.

Alternate Prodigy terrorists:  Enter PlumRugOfDoom as a case-sensitive profile name. The terrorists at Prodigy will now have purple streaked hair.

Airstrip: Get on roof:  At the B bomb (Counter Terrorist spawn), there is a way to get on the roof. You will need two people to do this. When you start, turn around and go to the bombed out "house". Jump on the bit of the house where you can, then jump up to the next part. If you need a running jump, you should use it but it is not necessary. You can now jump onto the tank. Run to the end and jump onto the boxes. Get one person to crouch down on the boxes and jump on his head. You can then jump onto the roof. When the Terrorists arrive to plant the bomb, you can take them out. To benefit the Terrorists, you can stop the Counter Terrorists from defusing the bombs.

Miami: Movie billboard:  Across the street from the bank at a theater, there is a billboard that reads "Half Life: The Movie starts Friday at 11".

Miami: Jump on top of movie billboard:  Get three players on top of the S.W.A.T. truck. Go to the edge and pile up on top of each other. Then, have the top person try to jump onto the billboard. Note: This may require a fourth player.

Miltia: Smoke screen:  At the Counter-Terrorist spawn point, take a right and go over to the fence. Throw a smoke grenade over the fence so that the people on the other side cannot see you. Run straight back to the wall so that the fence is a slightly away from you. You should be able to see through the smoke, and shoot.

Safe demolition:  Buy the riot shield. Play the match normally until the bomb is planted. Find the bomb, but before diffusing it, press B to go into riot mode. You will not take any damage while diffusing the bomb.

Using shields:  Enemies will not shoot if you have the shield active. Use this to your advantage. When you spot an enemy, activate the shields secondary and call for backup. Also, whatever side you shield is on, it will deflect bullets that are coming from that side.

Avoid falling damage:  When you are about to do a big fall, equip your shield's secondary function, look straight down, and jump. You will take no damage.

To get on top of tents, have a player crouch under one tent. Then, jump on his head. If both of you jump at the same time, you will land on top of it. You can now pick unsuspecting people off. It can benefit either team.

If you kill an enemy very close to the bomb site then crouch directly above the body and plant the bomb, it is now invisible except for the little blinking light. However, if you throw a smoke grenade you should be all right.
Go to the last sewer and jump on the rocks that surround it. Then, push towards it and you will go in the wall and become about 98% covered. This benefits the terrorist team.

Go to the counter-terrorist spawn point and climb up the rock on the left. From there, jump to the top of the right fence. Walk along it until you hit the wall, then look for the white flaw in the wallpaper of the map. Jump on that white line and follow it. From there you can jump onto the top of the sign and camp. This benefits either team, depending on the situation (camping counter-terrorists or terrorists trying to pick off counter-terrorists rescuing hostages.

In the terrorist spawn point on Miltia, there is a bed. Take a smoke grenade and get on the bed. Look down in the corner of the foot board. Throw the smoke grenade in that crack.

As a Counter-Terrorist, at the Dust 2 spawn point turn to the right and go to Bombsite B. Before entering the double doors toward the bombsite, there is a wooden box and stone crate to the left. Between the box and crate is a crooked space. Use your smoke bomb and throw it down. The Terrorist team can also do this trick.