Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Technical Difficulties (10 points): Attempt to access DNA Sequence 9 for the first time.
Battle Wounds (20 points): Complete DNA Sequence 1.
Sanctuary! Sanctuary! (20 points): Find a secure place to hide and re-enter the Animus.
Rome in Ruins (20 points): Complete DNA Sequence 2.
Fixer-Upper (20 points): Complete DNA Sequence 3.
Principessa in Another Castello (20 points): Complete DNA Sequence 4.
Fundraiser (20 points): Complete DNA Sequence 5.
Forget Paris (20 points): Complete DNA Sequence 6.
Bloody Sunday (20 points): Complete DNA Sequence 7.
Vittoria Agli Assassini (20 points): Complete DNA Sequence 8.
Requiescat In Pace (20 points): Complete DNA Sequence 9.
A Knife to the Heart (50 points): Secure the Apple of Eden.
Perfect Recall (30 points): Achieve 100% Synchronization with a Sequence.
D?j? vu (20 points): Replay a Memory.
Undertaker 2.0 (20 points): Discover the Shrine in the Catacombe di Roma.
Golden Boy (20 points): Discover the Shrine in the Terme di Traiano.
Gladiator (20 points): Discover the Shrine in Il Colosseo.
Plumber (20 points): Discover the Shrine in the Cloaca Maxima.
One-Man Wrecking Crew (20 points): Discover the Shrine in Palazzo Laterano.
Amen (20 points): Discover the Shrine in the Basilica di San Pietro.
Bang! (20 points): Destroy the Machine Gun.
Splash! (20 points): Destroy the Naval Cannon.
Boom! (20 points): Destroy the Bomber.
Kaboom! (20 points): Destroy the Tank.
Home Improvement (20 points): Upgrade 5 buildings in the Antico district.
Tower Offense (20 points): Burn all Borgia Towers.
Show Off (20 points): Complete 10 Guild Challenges.
.. .- -- .- .-.. .. ...- . (20 points): Solve all of Subject 16's Puzzles.
Perfectionist (20 points): Earn 3 gold medals from the Animus Virtual Training Program
Brotherhood (20 points): Recruit 3 Assassins.
Welcome to the Brotherhood (20 points): Train a recruit up to the Rank of Assassin.
Capture the Flag (30 points): Remove all Borgia Flags in Rome.
In Memoriam (20 points): Collect all Feathers.
Dust to Dust (20 points): Find one Artifact in the Present.
Serial Killer (20 points): Perform a Speed Kill Streak of 10.
Spring Cleaning (10 points): Kill a guard with a broom.
Your Wish is Granted (10 points): Throw money in a well.
Fly Like an Eagle (10 points): Jump with the parachute off the top of Castel Sant' Angelo.
The Gloves Come Off (10 points): Win the highest bet at the Fights.
Mailer Daemon (20 points): Access your email in 2012.
Synchronization Established (10 points): Complete an entire Session with at least one kill 
(Multiplayer Only).
Needle in a Haystack (5 points): Kill your target while hidden in a hay bale (Multiplayer Only).
Strong Closer (20 points): Take the lead 10 seconds before the end of the session and go on to 
win (Multiplayer Only).
Fast Learner (25 points): Kill your target and escape your pursuer in less than 10 seconds 
(Multiplayer Only).
Job skills (20 points): During Open Conflict, kill your target and escape (Multiplayer Only).
Download Complete (40 points): Reach Level 50 (Multiplayer Only).
Role Model (20 points): Get all the Co-op bonuses in one session (Multiplayer Only).
Overachiever (20 points): Score 750 points or more on a single kill (Multiplayer Only).
Abstergo Employee of the Month (20 points): Get every bonus at least once (Multiplayer Only).
Ahead of the Curve (20 points): Perform a double or a triple escape (Multiplayer Only).