The primary focus and hallmark of Splinter Cells gameplay is stealth with strong emphasis on light and darkness. The player is encouraged to move through the shadows for concealment whenever possible. The game displays a light meter that reflects how visible the player character is to enemies and night vision and thermal vision goggles to help the player navigate in darkness or smokefog respectively. Splinter Cell strongly encourages the use of stealth over brute force. Although Sam Fisher is usually equipped with firearms he carries limited ammunition and is not frequently provided with access to additional ammo. The player begins most missions with a limited supply of less-than-lethal weapons in addition to Fishers firearms a suppressed FN Five-Seven sidearm as well as a suppressed FN F2000 assault rifle midway through the game which includes a telescopic sight and a launcher for some of the less-lethal devices such as ring airfoil projectiles sticky shockers and CS gas grenades. Flexibility of movement is a focuspoint of Splinter Cell. Fisher can sneak up on enemies from behind to grab them allowing interrogation quiet incapacitation or use as a human shield. Fisher is acrobatic and physically adept 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.