A retinal scanner is a biometric security device that scans the unique imprint of a person's retina before unlocking a door. Only the correct retina will be accepted by the retinal scanner; if the incorrect retina is scanned, the door will not open and it is possible that an alarm will be triggered.
The player is able to capture high-ranking officials (including colonels and other officers) and force them to cooperate by allowing their eyes to be scanned. Once the correct set of eyes are scanned, a small image will appear on the screen showing that the eyes are being scanned. The locked door will unlock, allowing the player to open the door to restricted areas.
In Splinter Cell: Chaos Theory, the player was able to hack the retinal scanners instead of taking the required person captive. Hacking the device was possible either up close or remotely, using the EEV. Normally, the retinal scanner is more difficult to hack than keypad locked doors. In Splinter Cell: Double Agent, tje player was able to scan a unconscience or dead body's retina for use to scan into the retinal scanner for access. This occurred during the JBA HQ missions and allowed Sam to enter into retinal-locked restricted areas.
In Splinter Cell: Blacklist, a retinal scanner is shown in the cooperative mission where Sam Fisher and Isaac Briggs encounter one. In order to bypass the retinal scanner, he and Briggs lifted the enemy body up to the scanner to gain access. Fisher has a Retinal Scanner software/feature in his Fourth Echelon OPSAT, as evidenced by his ability to scan Jadid Haidos' eyes during the Insurgent Stronghold level.
- Tom Clancy's Splinter Cell
- Tom Clancy's Splinter Cell: Pandora Tomorrow
- Tom Clancy's Splinter Cell: Chaos Theory
- Tom Clancy's Splinter Cell: Double Agent
- Tom Clancy's Splinter Cell: Blacklist (Shown, not used in gameplay however.)