Tools of the Trade
Sam Fisher has a number of new tools in his arsenal, many of which will be revealed at a later date. For now, we can tell you about a couple of improvements and one of the better additions to Sam's toolbelt.

Sticky Cam: The Sticky Cam is going to become much more useful in Chaos Theory for two reasons. First, once you set up a sticky cam, you can quickly switch back to it any time you want throughout the rest of your mission. Secondly, you can now use multiple sticky cams. This is necessary thanks to the deeper AI as you'll want to keep track of enemy patrols.

Med Packs: Med cabinets are found throughout each level and contain multiple uses for curing Sam's ailments. If you haven't emptied a cabinet, you can return at any time for an extra bandaid or injection. This turns rooms with medkits into your default HQ or hub points from where Sam can venture out to explore a level.

OCP: The nice new addition is the OCP attachment to Sam's pistol. The OCP causes brief interference with electronic equipment. Instead of shooting out a light, you can now temporarily disable the light or any other piece of equipment. An AI enemy who notices a light flicker out will investigate, but will generally assume that it's a technical problem and not an intruder. Should an NPC enemy find broken glass from a shot out light bulb, they'll know there's an intruder and enter high alert.