Tips

Assuming you're very new to Ms, note that enemy tags are displayed as a vertical bar, or |

 

Here is a list of my most handy tips c:

• Try to be stealthy: Don't rush the middle of the map, you'll get wrecked right away. Be sneaky around corners, make sure to use F5 often.
• Try to find a good combo: At the start of the match, I always buy a Deagle and a flashbang, after the 1st round, I just upgrade from there. This is merely an example, you can experiment different methods on your own.
• Strategies: Know what to do in the gamemode you're playing, figure out what guns to use in what maps and develop different techniques with the different guns you purchase.
• If you're on the terrorist team, get a hold of the bomb (if you can), the money bonus helps you greatly in buying the more expensive and better weapons.
• As a counter terrorist, just try and be really careful on what you do, even the slightest move will unbalance the playing field.

 

That's the point.
Try to find a good plan for buying. My plan always involves the DEagle or Beretta.
Sneak. Even with the bar thing above your head you can still be seen. So sneak if necessary or near enemy territory. Sneaking also improves accuracy.
Aim for the head, multipliers are quite high compared to War/WarZ.
Stay with teammates. Either that, or make sure you can't be flanked.