You play as Agent 17, codename "Otto", who has a mission to secure top secret documents from a security building and escape in his getaway car located in the basement. The enemies, spies, are scattered throughout the 30-floor building and their only goal is to execute Agent 17 at all costs.
The game features various ways for Otto to kill the enemy spies: shooting them with his gun, kicking them by jumping onto them, or using a light on the ceiling in an elevator to drop it onto one of them. Additionally, Otto can crush enemies with elevators. Whenever a light is dropped, the hallways will be dark for a short period of time, making the enemy spies harder to see.
The gameplay involves navigating through the building, avoiding or killing enemies, and collecting top secret documents from rooms with red doors. Elevators are a primary means of transportation, but Otto can also use escalators to move around safely. However, if there is an elevator cable in the way, it will block him, causing him to fall.