Fisher is also extremely acrobatic, and has a variety of maneuvers including the ability to mantle onto and climb along ledges, hang from pipes, and perform a "split jump" in narrow spaces to mantle up a steep wall. This technique was introduced into the Metal Gear saga in Metal Gear Solid 3: Snake Eater, as CQC. For combat, Fisher is equipped with a suppressed pistol as well as a suppressed assault rifle that can be used for combat, sniping, and even for launching various non-lethal devices such as "sticky shockers" and "gas grenades." Fisher can also sneak up on enemies from behind to knock them unconscious or grab and interrogate them. The player is equipped with a "light meter" that indicates how visible they are to enemies, as well as night vision and thermal vision goggles to help the player navigate in darkness and spot enemies. Most of the game is spent sneaking around, using darkness and shadows to hide from patrolling guards, much like the Metal Gear games.
Splinter Cell's stealth-based gameplay, although frequently compared to the Metal Gear series, has more in common with that of the cult PC series Thief, which pre-dates it by several years. The creators argued that having two separate sets of goggles would make for awkward gameplay and convinced Clancy to allow it. Originally, Tom Clancy rejected the idea of Fisher having them, stating that goggles with both thermal vision and night vision are impossible to make. Sam Fisher's trifocal goggles are considered the "signature" symbol of the Splinter Cell series, as was intended by the character designer, according to the special features of the first Splinter Cell for Xbox. His boss, Irving Lambert, is voiced by actor Don Jordan. The character of Sam Fisher is voiced by actor Michael Ironside. Splinter Cell is a stealth based game produced by Ubisoft, which follows the story of American NSA Black Ops agent Sam Fisher.