The Gage Sniper Pack Add-on for PAYDAY 2 has 17 achievements.
Kill 250 enemies using only the Rattlesnake sniper rifle. Unlocks the "Long Barrel" for the Rattlesnake sniper rifle.
Kill 25 enemies shooting through walls or objects using only the R93 sniper rifle. Unlocks the "Wooden Body" for the R93 sniper rifle.
Kill 10 Shields by shooting through their shields using only the R93 sniper rifle. Unlocks the "Short Barrel" for the R93 sniper rifle.
Kill 25 enemies from 40 meters using only the Thanatos .50 cal sniper rifle. Unlocks the "Tank Buster" Barrel for the Thanatos .50 cal sniper rifle.
Kill 25 Snipers using only the Rattlesnake sniper rifle. Unlocks the "Tactical Aluminium Body" for the Rattlesnake sniper rifle.
Perform 250 headshot kills using any sniper rifle. Unlocks the "Vespula" mask, "Bug Shell" material and "Venomous" pattern.
Perform 100 headshot kills using any sniper rifle. Unlocks the "Tarantula" mask, "Insectoid" material and "Spider Eyes" pattern.
Perform 50 headshot kills using any sniper rifle. Unlocks the "Asilidae" mask, "Carapace" material and "Bugger" pattern.
Kill 3 enemies with one bullet using any sniper rifle. Unlocks the "Angled sight" for all sniper rifles.
Equip the Golden AK.762 rifle.
Kill 6 Skulldozers using only the golden AK.762 rifle.
Perform 500 headshot kills using any sniper rifle. Unlocks the "Sphodromantis" mask, "Hard Shell" material and "Wings of Death" pattern.
Perform a headshot kill on enemies using only the R93 sniper rifle while zip lining. Unlocks the "Compensated Suppressor" for the R93 sniper rifle.
Perform 10 headshot kills on Cloakers using only the Thanatos .50 cal sniper rifle. Unlocks the "Suppressed Barrel" for the Thanatos .50 cal sniper rifle.
Kill 10 Bulldozers using only the Thanatos .50 cal sniper rifle. Unlocks the "CQB Barrel" for the Thanatos .50 cal sniper rifle.
Kill 10 enemies using any sniper rifle while zip lining. Unlocks the "Theia Magnified Scope" for sniper rifles.
Kill 2 enemies with one bullet 25 times using only the Rattlesnake sniper rifle. Unlocks the "Sniper Suppressor" for the Rattlesnake sniper rifle.