within a few missions, the player gains access to the crosslink device. this allows the player to change the view to show all the security features of the building and their current connectivity, such as the light controlled by a given light switch. from here, the player can rewire these controls, within the current limits of the crosslink, such as by making a light switch control a secured door, or by completely disabling a security feature. the availability of which controls can be affected is initially limited at the start of the game, but as the player earns in-game money, they can buy improved features, such as being able to control encrypted controls or even affect weapons carried by guards. with the crosslink, the player can then create situations that would allow them to sneak through without being detected by guards, lure the guards into areas where they can be neutralized, or simply to gain access to secured areas of the facility. other tools to help navigate the building and avoid guards become available to purchase later. the player is ranked at the end of each mission based on time taken, number of guards knocked out/killed, number of times they were spotted, and how much noise or distraction they created.