if you go the additional memory bit in the pause menu it will tell you what they are, but from memory they are
Collect 20 Assassin's Flags (Masyaf)
Kill 60 Templars
Collect 100 King Richard Flags (in the kingdom)
Collect 33 Hospitalier Flags (Acre poor district)
Collect 34 Templar Flags (Acre Rich district)
Collect 33 Teutonic Flags (Acre Middle district)
Collect 100 Saracen Flags (Damascus - all districts)
Collect 100 Jerusalem Crosses (Jerusalem - all districts)
as for being worth unlocking...well you don't actually get anything for them (360 version has achievements for getting them though) but if you want the satisfaction that you completely finished the game, then they are worthwhile hunting down...i've only got about 25 flags in total to find and 2 templars...then i'm done
24/12/2007
R3 Gaming Blog http://tinyurl.com/3wyojy Cundletown, NSW