THB's ACR Challenges
Just an interesting idea, I thought it would be nice to put up some random challenges for people to try doing. These aren't in the game or anything, they kind of came out of my imagination and out of my thought that the game was too short.
- I See Dead People - Play through an entire mission with Eagle Sense on.
- Frag Out! - Kill an Assassination target with a Fuse Splinter Bomb.
- Death Sentence - Stick a Sticky Splinter bomb on a guard, then shoot him with the Hidden Gun before it explodes.
- Your Wish Is Granted - When Beggars harass you, throw an Impact Gold Bomb at your feet and walk away.
- Meep Meep! - Set a Tripwire Tactical Bomb near a Merchandise Lift and use the lift after someone is stunned.
- That Was So Sick! - Hook and throw a guard, immediately Ground assassinating him after.
- I Don't Have Time For This - Hook and throw a rooftop guard off the building, causing his death.
- Adding Injury to Insult - Counter Steal a Jannisary then One Shot punch kill him immediately after.
- You Like My New Toy? - Mess with Duccio using your Hookblade.
- Synch Half Empty or Half Full? - Do not Counter Kill anyone during the first mission.
- Places To Be - Beat the Yerebatan Cistern mission in 6 minutes.
- Disregard Gravity, Acquire Facemash - Punch Ahmet in the face 3 times in a row.
- Freeeedom! - Desynchronize by climbing one of the city walls and parachuting off the Unavailable Area side.
- Kamikaze - Stick a Sticky Splinter Bomb on a guard, then grab and throw him into a group of guards/civilians.
- Riot Shield - Have a guard point his pistol or rifle at you, then grab a guard and use him as a meat shield.
- This Wasn't In The First Game..! - Do a Lamp Turn as Altair.
Emblems
- Flying Eagle - Air Assassinate every possible Assassination target.
- Bruised Eagle - Complete the game with only your Fists.
- Raging Lion - Kill every possible Assassination target in melee combat.
- Striking Snake - Kill all possible Assassination targets with the Poison Blade or Poison Darts.
- Enduring Turtle - Complete the game without any Deaths.
- Clumsy Bear - Be detected over 50 times over the course of the game.
- Falling Angel - Synchronize with every possible Viewpoint in the game.
Dude, spoilers. 
Other than that, very clever ideas! I will be sure to check them out. 
I don't think it's terribly spoiler-y. But still, thank you Phi, because we do need to be aware of it. (I *still* haven't been able to finish the game - out of town for a week - but nothing on that list spoiled anything, for me at least.)
Great list, DAZ! 
Disregard gravity, acquire facepunch is a heavy spoiler, Lisa.
Good job dragging ATTENTION to it Phi 
Nice ideas, DAZ.
Meep Meep! - Set a Tripwire Tactical Bomb near a Merchandise Lift and use the lift after someone is stunned.
That just sounds funny.
That Was So Sick! - Hook and throw a guard, immediately Ground assassinating him after.
I Don't Have Time For This - Hook and throw a rooftop guard off the building, causing his death.
Already did those. Funny how a guard will sometimes survive being hook thrown off a roof.
You Like My New Toy? - Mess with Duccio using your Hookblade.
I bumped into Duccio only once in the game. Do you fight him in a side mission?
Freeeedom! - Desynchronize by climbing one of the city walls and parachuting off the Unavailable Area side.
Glad you can actually climb the city walls in this game. One time I accidentally jumped the wrong way and found myself stumbling down some rocks on the other side until I finally fell in water. I didn't desynchronize so I think I found a way to get off the map.
If you free roam enough, you can spot Duccio stumbling drunk in an area. You can beat him up for an achievement/trophy. I came across him by accident.
these should have been achivements
Anyone know how to find a tax collector? I haven't been able to find one at all. :/
Apparently, you have to be carrying a lot of money or something. I came across one once, but that was when making the variety pack for "On the Attack", so I couldn't chase after him and the stupid lock system wouldn't work with me. >.<
Oh, that's probably why. I haven't really had a lot of money on me at once. I'm currently buying each shop and landmark and just 100% synced the story. I said to everyone since ACB that my goal was to get every achievement in the AC series, and that's what I'm trying right now. Only...4 more?