Tom Clancy's Splinter Cell Chaos Theory talks about a US National Security Agency employee named Sam Fisher. The plot takes place in 2008 at the height of the information war. From time to time, hackers carry out sabotage, break into security systems and block access to electricity. The agents' job is to protect intelligence data. To do this, you need to destroy the villains.

The gamer chooses the style of playing “Tom Clancy Splinter Cell: Teria Chaos” himself, but the gameplay is focused on stealth and hidden attacks. For example, a character will be able to hide in the shadows created using a special device. His arsenal also includes a knife and an Earth Fighter assault rifle. The hero also knows how to obtain information by threatening the enemy and fight in hand-to-hand combat. For example, you can sneak up on an enemy and break his neck.

There are also attacks that disable but do not kill the enemy. The passage here is non-linear, so the user will be able to replay levels and choose different paths. On the screen, in addition to the life scale, there are indicators of noise, visibility and other marks. If you can interact with surrounding objects, a notification appears about this.

When the hero is spotted by a camera or makes a mistake when selecting the code to open the lock, an alarm icon is displayed. Depending on its level, the behavior of opponents changes. For example, they can enhance armor. Before starting each mission, the character must undergo training and take a set with lethal or non-lethal weapons. A third pack is also available, provided to the protagonist by Redding. He also does reconnaissance on missions. There are also mini-games where you have to hack locks, computers and other gadgets.