The Enemy of the Poor achievement has nothing to do with the harassers (aka crazy guys that push you around). You actually have to grab and throw the beggers the chicks that ask for food and money. Just a side not it doesn't matter how many times you throw one of them it's grabbing 25 individuals. throwing the same person multiple times doesn't contribute to the overall count.

Also for all you that are Flag/Templar hunting go to http://www.assassinscreed-maps.com/ they have screenshots of all the locations of Flags and Templars. It's easiest to start a new game and just go slow through a section of town as I could never remember I had already picked up flags.

I think that what I'm going to say is "fan fiction" but I read it so long ago that I can't really say for sure where or when I saw it. I could be blowing smoke so continue to read if you want...

All the sci-fi stuff is set in the future, and people have discovered that you can look into the past through your genes, so when you die or bring up the menu you get this sci-fi thingy, they said death in gameplay was more like your memory was fuzzy. So you are some guy in the future and you're looking at your great-great-...-great-grandfather Altair's memories. This kinda does leave the game open for future games along the same premise, or with the unknown character in the future. Also the dev. team has said that the conspiracy that you unfold has ties to the modern world.

Like I said I have no proof of any of this as, I don't rememer where I saw it so take it for what it's worth.

In doing the main quest:

You can gain like 5 levels (that's exagerated) if you take your time and kill everyone in the gate. But after a while it gets annoying to do kinda the same thing. One fun thing to do is to just tank through the gates. Running through the gate and having everyone chasing you can be quite fun. If you don't fee like being cheap just remember this:

Resting for 1 hour is FAR more beneficial then just standing around waiting for you health to regenerate. if you rest for an hour your health, enduarnce, and mana will completely regenerate.

Also if you are an alchemist (most people aren't but it's a good way to get money fast) take every bit of food that you can find. DONT make a 4 ingredient potion, it doesn't do any good even when you're an expert/master (whichever is higher) they take the crap load of restore fatigue potions taht you just made and sell them for money. it really helps if you're trying to save up for a specific item.

Also this is entertaining, if you're a thief and an alchemist and you have good sneak, steal stuff from store owners while they are watching you make a potion out of those goods (cause you can't sell stolen stuff to them) and then sell them the potion. You can't sell stolen goods to normal shopkeepers but once you've taken a stolen apple mashed it up and mixed it with a pumpkin there is no way for them to know it was stolen... 

I have to say that I am an achievement whore. I'm not one for online play but i have all the single player achievements for each game that I own. Some of the achievements are dumb like for instance to get all the R6 ones you have to go out and buy the camera and take your picture. I'm never gonna do that. But if I did  i'd take a picture of a black piece of paper, so that online if you looked at me and tried to shoot me in the head there wouldn't be one...

That and the #1 ranked for GRAW is stupid i bet like 2 people have that one.