In the beginning of each mission you choose what equipment you will be using and have to listen to the mission Intel in order to bring the optimal equipment. This game is not about shooting Germans or sabotaging though, it's about rescuing civilians, some of which does not want to be rescued and must be pepper sprayed to see it your way

It is also about arresting bad guys.
Usually you can choose to enter the level through several different entrance points. When you encounter an enemy you can yell at him to drop his weapon, sometimes they comply, sometimes they try to kill you. Not giving propper warning drops your score. Killing bad guys instead of arresting them also does. You have to cuff you suspects and report them in and so on, also weapons and evidence must be confiscated immediately. Further more, you always have a sniper or two standing by to drop tangos.
The only thing the game misses is the ability to call for backup, you always alone in there, with your team, and thus you feel a little disconnected on your missions.
All in all, it's a very realistic take on police operations. SWAT I guess... It's old though, but on the bright side, that makes it cheaper.
The variety of equipment you can choose from is very nice. You can take with you several grenades for tactical deployment (all non-lethal), an electronic version of the "mirror on a stick", several breaching tools including a shotgun with steel arrows. Several firearms, tasers, pepperspray, door wedges to keep doors locked and theres even a high-power paintball gun which fires bullets loaded with pepperspray. You can even swap your ammunition if you know your going up against armored tangos.
It's very nice, give it a look!