I have to agree in part with MrFoxer and some of the other more critical reviews. SWAT 4 might well be one of the better tactical shooters out there as described by several user reviews, but the AI (especially that of your fellow officers) can be frustratingly flawed at times. Sometimes they perform very well, other times terrible - and not necessarily in a realistic "people make mistakes" kind of way. Some close-in combat situations seem to cause odd and clumsy behaviour, often leading to the loss of team members. AI performance and mission outcomes will, to varying degrees, depend on sufficient planning (selection of weapons, gear, entry points), and proper tactics and leadership during the mission. Success is more likely when you adapt your tactics according to each situation - which I guess is pretty much the whole point behind the game - but I feel it could have been considerably better with proper AI.