- Easy 'Weapons Acquireor' achievement
Successfully complete single player Story mode to unlock all weapons except the AK47 assault rifle, AKS-74U sub machine gun, and SR-2M machine pistol. These weapons must be collected and returned to the nearest weapons stash in co-op Story mode.

- Achievements
Do the following things to obtain the corresponding Gamerscore points:

10 Points
Gadget Improved	Purchase all 3 upgrades for any 1 gadget.
Weapon Improved	Purchase all 3 upgrades for any 1 weapon.
Accessorizing	Purchase any 1 accessory for any 1 uniform.
Face Off	Be victorious in one match in 'Face-Off' game mode on any difficulty.
Last Stand	Finish any 1 map in 'Last Stand' game mode in co-op.
Variety	Purchase any 1 uniform.
Hunter	Finish any 1 map in 'Hunter' game mode in co-op.
Revelations	Discover Anna Grimsdottir's dark secret.
20 Points
Perfect Hunter	Finish any map in Hunter without ever having been detected on realistic difficulty.
Last Stand Completionist	Finish all maps in 'Last Stand' game mode on rookie or normal difficulty.
Gadgets Expert	Purchase both upgrades for all gadgets.
Hunter Completionist	Finish all maps in 'Hunter' game mode on rookie or normal difficulty.
Face-Off Completionist	Finish all maps in 'Face-Off' game mode using any connection type.
Weapons Expert	Purchase all 3 upgrades for all weapons.
Quality Time	Invite a friend to join and participate in a co-op story or game mode session.
Ready For Anything	Purchase all 9 accessories for all uniforms.
Weapons Acquireor	Unlock all weapons in the weapon vault.
Fashionable	Purchase all 6 texture variants for all uniforms.
30 Points
Preparation Master	Finish all prepare & execute challenges.
Best Of The Best	Finish all Splinter Cell challenges.
Stealth Master	Finish all vanish challenges.
50 Points
Hunter Master	Finish all maps in 'Hunter' game mode on realistic difficulty.
Last Stand Master	Finish all maps in 'Last Stand' game mode on realistic difficulty.
Co-op Realistic Difficulty	Finish the co-op story on 'Realistic' difficulty.
Last Man Standing	In Last Stand, survive all enemy waves of any map in one session without failing on any difficulty.
Well-Rounded	Finish all challenges.
Realistic Difficulty	Finish single player story on 'Realistic' difficulty.

10 Points
Judge, Jury and Executioner	Take down Tom Reed.
Man of Conviction	Allow Tom Reed to live.
Survivor	Battle your CO-OP teammate and survive.
20 Points
White Box Laboratories	Finish Single Player Story 'White Box Laboratories' on any difficulty.
Michigan Ave. Reservoir	Finish Single Player Story 'Michigan Ave. Reservoir' on any difficulty.
Lincoln Memorial	Finish Single Player Story 'Lincoln Memorial' on any difficulty.
Washington Monument	Finish Single Player Story 'Washington Monument' on any difficulty.
Russian Embassy	Finish CO-OP Story 'Russian Embassy' on any difficulty.
Third Echelon HQ	Finish Single Player Story 'Third Echelon HQ' on any difficulty.
Merchant's Street Market	Finish Single Player Story 'Merchant's Street Market' on any difficulty.
St. Petersburg Banya	Finish CO-OP Story 'St. Petersburg Banya' on any difficulty.
Downtown District	Finish Single Player Story 'Downtown District' on any difficulty.
Kobin's Mansion	Finish Single Player Story 'Kobin's Mansion' on any difficulty.
Yastreb Complex	Finish CO-OP Story 'Yastreb Complex' on any difficulty.
Price Airfield	Finish Single Player Story 'Price Airfield' on any difficulty.
White House	Finish Single Player Story 'White House' on any difficulty.
Modzok Proving Grounds	Finish CO-OP Story 'Modzok Proving Grounds' on any difficulty.
Diwaniya, Iraq	Finish Single Player Story 'Diwaniya, Iraq' on any difficulty.

20 Points
Experimental Treatment	Finish CO-OP 'Salt Lake City, UT' mission on Rookie or Normal difficulty.
Rise from the graves	Finish CO-OP 'New Orleans, LA' mission on Rookie or Normal difficulty.
Just free yourself	Finish CO-OP 'Portland, ME' mission on Rookie or Normal difficulty.
Who let the docks out?	Finish CO-OP 'San Francisco, CA' mission on Rookie or Normal difficulty.
30 Points
Thinking inside the box	In the first area of the 'San Francisco, CA' map, neutralize twelve enemies inside containers.
Demolition crew	Finish CO-OP 'Under Construction' while shooting all the explosives in realistic difficulty.
King of the crypt	In the 'Crypt', perform twelve hand to hand takedowns without alerting other enemies.
Watch the soap	In the 'Washroom', neutralize eighteen enemies.
50 Points
Team congratz	Finish Deniable Ops

- Easy challenges
In the mission where you infiltrate the White Box company, after killing the guard by the front car lot, infiltrate the building. When you first see the room, you can climb up the pipe or throw an object (frag grenade, proximity mine, remote mine, sticky cam, or EMP grenade) into the room. Even on the Realistic difficulty, the most the AI can do is shout and raise their guns, provided you have upgraded each gadget to the maximum. This room provides many ways to get and complete any challenge, except for most of the Splinter Cell challenge group. Notice: This can be repeated as many times as desired by reverting back to last checkpoint.

- Easy 'Judge, Jury and Executioner' and 'Man Of Conviction' achievements
Reach the final level in the game in the White House, and choose either to kill Tom Reed or spare him to get the 'Judge, Jury and Executioner' achievement (if you kill him) or 'Man Of Conviction' achievement (if you spare him). To easily get both achievements, once the game is completed and the credits have begun, select the 'Continue Story' option at the main menu. You will resume the game closer to the ending choice, instead of repeating the entire game again, and can select the other ending to get the other achievement.

- Easy 'Last Man Standing' achievement and Multi-kill challenges
Play Last Stand mode with a partner in Co-op mode. Select the Mozdok Grounds 1 map. Choose three Gadget Improves for your suit; Five-Seven and AK47 (or any gun with a scope) for weapons; and Proxy Mine, Remote Mine (or whichever required for challenges) for gadgets. Have each person stand by the door on the second floor stairwells so you are inside the stairwell. Shoot out the light above you, if one is present. Look directly out the door or to the right (depending on which stairwell you are in) to see a doorway. As long as you stay in the stairwells, it will force the enemies to only spawn from that doorway. Just focus fire on the doorway (headshots). If you get overwhelmed, toss a mine at the door. After you clear a wave, run over to the dead enemies to collect ammunition for the next round, then hurry back to the stairwells. Repeat this as many times as desired. If done correctly, you should be able to complete it in approximately twenty minutes without ever dying.