Kill 1 enemy.
Kill 2 enemies by using Mark& Execute.
Headshot
10Kill 1 enemy by using a headshot.
Dirty Hands
15Perform a Melee kill link.
Mind Reader
15Perform 50 headshots.
Kill 5 enemies while using a Human Shield.
Complete 1 mission without using a gun.
Graduate
10Complete Mission I.
Diver
5Complete Mission II.
Complete Mission III.
Complete Mission IV.
Siblings
5Complete Mission V.
Ghost
5Complete Mission VI.
Complete Mission VII.
Complete Mission VIII.
Flash
5Complete Mission IX.
Complete Mission X.
Reunion
5Complete Mission XI.
Sam Fisher
20Complete the game.
Complete the game in Splinter Cell level