First off, it should be understood that in Counter-Strike: Source (CS), there are numerous different map types. These kinds are:
Bomb Map (de)
The Terrorist goal in a bomb map is to run to a particular location (marked in your map) and plant an explosive. The explosive is on a timer, so once it is planted, you must defend it until detonation.
The counter-terrorist goal on bomb maps is to avoid the terrorists from planting the bomb at all costs. This can be carried out by eliminating all the terrorists, defusing the planted bomb, or (in some cases) defending the bomb site until time runs out.
Hostage Rescue (cs)
In hostage rescue maps, the primary goal for counter-terrorists is always to rescue hostages captured and held by the Terrorists. You can even win by eliminating the terrorist team.
The Terrorist goal is always to simply avoid the counter-terrorists from rescuing the hostages by eliminating them, or maintaining control of the hostages until time runs out.
Bomb Maps – Counter-Terrorist
As a counter-terrorist on bomb maps, your best bet (by far) is to get rid of the terrorist team before they could plant the bomb csgo trade. Defusing the bomb makes you a sitting duck, and this can be a situation you want to avoid. Keeping the terrorists seeking to plant the bomb means you’re able to remain on the defensive, which gives you an advantage.
Bomb Maps – Terrorist
As an enemy, your only goal is to completely overrun a bomb site. If you cannot assume control of a bomb site within the first 30 seconds, your team will probably lose the round. The most effective strategy is always to rush everyone on a group aside from 2 or 3 (tops) to an individual site. One other few players will behave as a diversion at one other site, so the counter-terrorists guarding it don’t can be found in as re-enforcements.
Hostage Maps – Counter-Terrorist
I are finding the most effective strategy to be spreading the team out and attacking from all angles. Coordinate a simultaneous attack if possible, but be sure nobody just “runs in, guns blazing,” because that technique almost guarantees death in a hostage map.
If one side of the attack manages to punch through and get inside the area under Terrorist control, the remaining portion of the team should move to that area in order to assist the attack.
Hostage Maps – Counter-Terrorist
As terrorist, your only strategy here should really be to sit and wait. Your goal is to allow them to arrive at you. Sit, Wait, and SHOOT!
Shoot a circular out of your pistol in the beginning of the match. Once you think (or hear) an enemy nearby, switch to your pistol, press reload, and quickly switch back once again to most of your rifle. Most enemies will jump out and attack if they hear the reload sound, because they believe you’re defenseless.
This has become a staple of counter-strike in the last years, but some players do not quite understand it. If you should be in a firefight at range, you are able to strafe-shoot to keep accuracy but still get yourself a difficult target.
Just how strafe-shooting is performed is by pressing (or tapping) the strafe key to get your player moving and releasing it really as you commence to fire. Your player will continue to move for another step, however your shots will be accurate.
The AWP No-Scope
Many people experienced problems with this, and it is really so simple. A No-Scope shot is whenever you shoot an opponent with a sniper rifle without using the scope. For many sniper rifles, the cross-hairs have been removed when you’re not using the scope, and the weapons are extremely inaccurate. This was done intentionally to force individuals to use the scopes on sniper rifles. The problem with the scope is that it’s difficult to make short-range shots, and your player moves very slowly while looking through it, so you become an easy target. The answer to this is actually the No-Scope shot.
The No-Scope is performed by just pressing the right and left mouse buttons at the same time frame while your intended target can be as close to the center of your aiming point as possible (you have to estimate this). The scope will appear for a small fraction of an additional, and your shot will be accurate.
You will notice after playing Counter-Strike for quite a long time that a lot of players follow very predictable patterns. Ammunition is expendable, and the rifles (AK-47, M4, etc.) will penetrate through about the first 3 inches of a corner. When approaching corners that likely have opponents on one other side, shoot the corner. You will often hit your enemies before they see you.