We haven’t tried the following yet, but these are supposed to be achievements to unlock Gamescore points in Assassin’s Creed. If you’ve tried one or more, post a comment to say if they work. Cheers!

  • Absolute Symbiosis (45 pts): Have a complete Synchronization bar.
  • Blade in the Crowd (30 pts): Kill one of your main targets like a true assassin.
  • Conversationalist (20 pts): Go through every dialog with Lucy.
  • Defender of the People: Acre (20 pts): Complete every free mission in Acre.
  • Defender of the People: Damascus (20 pts): Complete every free mission in Damascus.
  • Defender of the People:Jerusalem (20 pts): Complete every free mission in Jerusalem.
  • Disciple of the Creed (30 pts): Assassinate all your targets with a full DNA bar.
  • Eagle’s Challenge (20 pts): Defeat 25 guards in a single fight.
  • Eagle’s Dance (10 pts): Perform 50 leap of faith.
  • Eagle’s Dive (20 pts): Perform 50 Combo Kills in Fights.
  • Eagle’s Eye (15 pts): Kill 75 guards by throwing knives.
  • Eagle’s Flight (20 pts): Last 10 minutes in open conflict.
  • Eagle’s Prey (20 pts): Assassinate 100 guards.
  • Eagle’s Swiftness (20 pts): Perform 100 Counter Kill in Fights.
  • Eagle’s Talon (15 pts): Perform 50 stealth assassinations.
  • Eagle’s Will (20 pts): Defeat 100 opponents without dying.
  • Enemy of the Poor (5 pts): Grab and Throw 25 Harassers.
  • Fearless (25 pts): Complete all Reach High Points.
  • Gifted Escapist (5 pts): Jump through 20 merchant stands.
  • Hungerer of Knowledge (20 pts): See 85% of all the memory glitches.
  • Keeper of the 8 Virtues (10 pts): Find All Hospitalier Flags in Acre.
  • Keeper of the Black Cross (10 pts): Find All Teutonic Flags in Acre.
  • Keeper of the Creed (10 pts): Find All Flags in Masyaf.
  • Keeper of the Crescent (20 pts): Find All Flags in Damascus.
  • Keeper of the Four Gospels (20 pts): Find All Flags in Jerusalem.
  • Keeper of the Lions Passant (25 pts): Find All of Richard’s Flags in the Kingdom.
  • Keeper of the Order (10 pts): Find all Templar Flags in Acre.
  • March of the Pious (5 pts): Use Scholar blending 20 times.
  • Personal Vendetta (40 pts): Kill every Templar.
  • The Eagle and The Apple - 1191 (100 pts): Complete Assassin’s Creed.
  • The hands of a Thief (15 pts): Pickpocket 200 throwing knives.

Thanks to Mike for providing those :)