CS
CS is also a team based mod, but this time it revolves around Counter-Terrorist and Terrorist activities.
You can choose to either be Counter Terrorists (CTs) or you can choose to be terrorists (Ts).
It does not matter which model you choose once you've picked your team. No model has an advantage over another.
There are three different types of maps:
cs_xxxx - these are counterstrike maps i.e. the objective is to either neutralise the opposing force or prevent them from hiding/rescuing the hostages before the round ends.
as_xxxx - these are maps where you must either help the VIP escape (CTs) or assasinate him (Ts).
de_xxxx - these are defusion maps, where you must either place the bomb (Ts) and prevent the opfor from reaching it and defusing it (or get liquidated by the opfor), or vice versa (CTs).
the best strategy is to stick in twos or threes and keep constant radio contact (via the 'C' 'X' 'Z' keys). Or alternatively Camp in a dark or highly concealed location with a rapid firing yet controllable weapon (inadvisable if your CTs) such as the MP5 Navy or the UMP 45.