The stage has three different floors which contain Safes. The floors are divided into three colors: red, blue, and yellow. They are also divided into three different blocks, or sections. At the start of the level, a random color floor is already active.
In this stage, there are giant fans, springs, locks, and enemies as obstacles. The Safes can only be entered (by digging into them) once the switch for it has been pressed. Switches to these are located in the upstairs room. Only one switch can be active at a time.
Rouge begins the level by defeating an enemy. She then moves on to explore the Hall and look for the emeralds. Rouge must collect the three Chaos Emeralds hidden throughout the level in five minutes.
The Mystic Melody is required for this mission to collect some Rings that are hidden by the Ancient Ruin. Some Rings are hidden inside containers, and others are inside safes.
Find the Chaos Emeralds within 3:30
Security Hall is not very large, so finding the emeralds with the radar should not take too long. The player should begin by gliding around the lower floor, and if nothing comes up, they should move to the top. It is worth noting that Chaos Emeralds can be hidden inside safes.
Find the lost Chao
The player should start by taking the pulley to the top floor and standing at the highest floor in front of the yellow letters at its beginning. They must turn on the Treasure Scope, and they will see a spring on top of the letter "B". They must bounce from it to reach a platform where the player finds the lost Chao.
Clear Hard mode
The first Chaos Emerald is hovering above the fans to the right of where the player begins. The current juggles the player above the emerald's location, so the player has to perform a drill attack to grab it. For the second emerald, the player must head to the top floor and navigate through the lasers and toward the yellow safe switch. They must then climb up one of the two large boxes just in front of it and glide over to the emerald floating between them.
The third Chaos Emerald is inside the safe directly below the crusher on the red floor in B block. The player must first open the red safes in the Switch room, then go to the B block and climb to the steel platform. They then need to use the Treasure Scope and hit the Spring, which will make Rouge activate a switch that will stop the crusher.
Chao Container locations
Red floor, A block: It is on the ground and in the middle of the two farthest metal crates, opposite the safe rows.
Blue floor, at the boundary between B and C block: It is inside the safe directly above the metal crate.
Switch room, yellow area: It is next to the crusher and between the two metal crates.
At the beginning of the stage, the player should jump over the right rail and float above the fans in the upper left corner, close to the bar wall. From there, Big can be seen hiding under the floor holding onto the wall below. The player should carefully Drill Drive under the floor, then glide toward the central pillar, which will allow a better look. However, descending as far down the wall as Big is will result in the loss of a life.
In Hard Mode, Big can be seen clutching onto the money fan in front of it.
For mission 2, if the player goes up to the very top area, they will find a shrine that activates when playing the Mystic Melody. This will give a large number of rings laying around in the spot which can help with this mission.
This is another 3rd mission in which the Mystic Melody is not required to get the Chao (the Treasure Scope is needed which requires the Mystic Melody, however). This can be finished very quickly.
Sonic's face is printed on the cash blowing around in the stage.
Rouge told Shadow to set the timer for five minutes, despite Eggman telling them to set the timer for fifteen minutes, which Shadow did, so it is unknown why the player had to finish the stage in five minutes.