* When you start the game, a quick animation will show a hook with a line connecting to the top of the elevator. Then your character will slide down the line to the roof. Then he will enter the building, in the elevator, at the 30th floor. It is now up to you to get all the secrets and make it to your car. The first thing you must know, obviously, is how to eliminate the enemy agents that are after you. There are a few ways you can do this :
1) Just shoot them. Of course, especially in the later levels, enemy agents make themselves an impossible target by lying down. You can only take them out by riding an elevator down.
2) Jumping on them will take care of them. In addition, you may avoid some of their fire.
3) On the non-dark floors, shoot the light down on top of an enemy agent. You must do this from the elevator. This also has the added effect of causing temporary darkness in the building, making enemy agents harder to see.
4) Crush an enemy agent using the elevator. This is hard to do since they move around. You may get lucky, however, and get one under or on top of the elevator you are on.
5) This way is pretty hard. You might be able to get an enemy agent to follow you and fall down the hole created by the missing elevator.

* You must know how to use the escalators and open the red doors :
1) To use the escalators, just stand on the little rectangle. Then push the joystick UP or DOWN depending on which direction you need the escalator to take you.
2) To open the red doors, stand on the little rectangle. Face the doorknob and press RIGHT on the joystick.

* You have full control over any elevator you enter. This means you can move UP and DOWN on a dime to keep your character safe. This works until the alarm goes off.

* Speaking of elevators, your character cannot duck while in an elevator. Also, while riding the escalators, your character cannot duck, jump, or fire his weapon.

* Also on elevators, you do not have control when you are riding on top of them. This means you are at the mercy of the elevator or the enemy agent controlling it. Be very careful if you ride on top of the elevator. You also cannot go past the bar on the top of the elevator.

* Enemy agents usually come out of the doors on the current floor or the floor above and below. A lot of times it is good to lay a wall of fire down a hallway. This way, you can pick off any enemy agents that happen to come out of one of the doors.

* When you enter through one of the red doors, the enemy agents will lose track of your character but will have a general idea of where your character is. When you exit the room, crouch and lay down fire both left and right to clear off the floor.

* As the levels progress, the enemy agents get better at their tactics. They start to crouch more to mess up your fire. They also may lay down which makes it impossible to hit them unless you are on an elevator and can shoot along the floor.

* As you move up in levels, there will be red doors in odd areas. Areas such as on the lower five floors where only elevators can take you across. Of course, if you get good with the jump button, you can jump those gaps to get to either side quicker. The downside is that enemy agents will usually flood the area and lay down a lot of fire.

* If you happen to get to the B1 floor and you have forgotten to get a red door, the game will automatically put your agent at the door you missed. If it is multiple doors, then you will be placed at the highest floor first.

* There is an internal time limit on how long you can take to get everything out of the building. If you take too much time, an alarm sounds and the following things occur :
a) Although you still have control over the elevators, it is much harder to get them to respond to your commands. If you are in a tight situation that requires a little bit of time, don't wait till the last minute or you may be an ex-agent.
b) The enemy agents move much quicker and their shots move faster. Plus, additional enemy agents will start appearing to really make your life miserable.
c) If your character happens to die, the next man will still be facing the same alarm situation. The only way to resolve the situation is to get all of the secrets and make it out of the building.

* Watch out for the double elevator. If you are in the top car, it will stop two floors short of the bottom since there is a one floor gap, and the bottom car. Try to always get into the bottom car of a double elevator so that you can make a hasty exit and not be trapped with enemy agents firing on you.