Urban Warfare simulation.
If you just burts into rooms shooting at everything and think your a one man army you will die because in SWAT 4 you will only need to make one mistake and your a corpse. You enemies are randomly placed so you will never know when and where they might pop up.
Other is the strategy, you must decide what equipment to use based on what you know about the enemy (are they wearing gas-masks for example, are they fanatic or part time-crooks, what do they have for weapons, what you know about eventual civilians (can they can turn hostile or run into the the crossfire in sheer terror) and even what environment you are in (can the bullets you use penetrate walls or reinforced glass), you must also decide if anything in the area can cause unwanted explosions due to misguided shots and so on. You will have lots of preperations to make before you can go into action, you might even want to study the areas blueprints and lay up a plan so you won't act in darkness (so to speak).
This game is of massive gameplay based on quick reflexes, quick thinking, leadership and nerves cold as ice. The sounds and graphics are awesome but still the game is too short but if you join up online you will find hours of endless fun.
This is definatly a game for you if you like slow-paced jumping to fast-paced thinking i seconds and for once thinking like a real police man instead of the average superhero solider that runs through a sea of bullets.