whole lotta difference between CS and Firearms. firearms is more like tfc but with modern day weapons and its based on 2 sides of a war. Friendly fire is almost always on because its supposed to simulate a war environment. Everyone wears the "woodland" camo uniform. the only way you can tell if that guy is a friendly or not is by a band on their arm that is either red or blue. you can customize your own guy, basically make him with body armor, which wepons they carry and what skills they have. as you get more points you get promoted and when you get promoted your skills are more refined. it's hard to explain completely but the games are totally different.