In the game the player assumes the role of a spy who infiltrates a building filled with elevators. He must collect secret documents from the building and traverse the 30 floors of the building using an increasingly complex series of elevators. The player is pursued by enemy agents who appear from behind closed doors. These agents must be dealt with via force or evasion. Successful completion of a level involves collecting all the secret documents and traversing the building from top to bottom. In the lower floors of the building the elevator systems are so complex that some puzzle-solving skills are needed.
In the game the player assumes the role of a spy who infiltrates a building filled with elevators. He must collect secret documents from the building and traverse the 30 floors of the building using an increasingly complex series of elevators. The player is pursued by enemy agents who appear from behind closed doors. These agents must be dealt with via force or evasion. Successful completion of a level involves collecting all the secret documents and traversing the building from top to bottom. In the lower floors of the building the elevator systems are so complex that some puzzle-solving skills are needed.
The controls consist of a 4-way joystick and two buttons one for 'shoot' and the other for jumping and kicking.

The player assumes the role of Agent 17 codename: 'Otto' a secret agent for an unspecified organization or government. As Otto the player enters a 30-story building from the roof and must collect a series of secret documents hidden inside. Red doors indicate the location of these documents and Otto must use the building's elevators and escalators to reach them while avoiding or defeating the enemy agents trying to stop him. Once Otto has all the documents he must reach the basement and escape in a waiting car to advance. Each level contains a section in which the lights are out making it difficult to see the enemy agents unless they are in an elevator. Beyond this section the player must navigate a complex series of elevators to avoid agents retrieve the last documents and reach the basement exit.
Otto can move left or right and jump; when in an elevator or at one end of an escalator pushing up or down will move him one floor in that direction however pushing down will not cause Otto to drop to a knee while in an elevator. He can fire his pistol at enemy agents up to three rounds at a time and drop to a knee to avoid enemy agents' high shots when not in an elevator. In addition Otto can ride on top of an elevator car (but not have control of it) and if the car is above him jump across the empty shaft. He can defeat enemy agents in four ways: shooting them getting close enough to jump at and kick them shooting out an overhead light so that it falls on them (which temporarily knocks out the building lights) or crushing them with a moving elevator.
On higher levels the enemy agents will shoot more frequently and their bullets will travel faster. They will drop to a knee or assume a prone position to avoid Otto's shots but cannot jump over low bullets. If the player takes too much time indicated by a hurry-up alarm sound and sped-up background music the enemy agents become more aggressive and the elevators become slow to respond to the player's joystick movements. If the player tries to use the basement exit without collecting every document Otto will be automatically transported back to the highest floor that still has an unopened red door.