Before you begin, gain enough experience to unlock the Pilfer Skill in the skill tree. It will make this achievement easier.
Load mission 2: The Doors Of Korrangar on discovery difficulty.
At the beginning of the mission slide down the rope to your right.
Hop down onto the black roof below and the game will save.
Hop through the opening in the ceiling, down the stairs (to the right).
You'll see a guard straight ahead with a vial of amber on them.
Sneak behind them and grab it.
Get caught or jump off a ledge and repeat 9 more times.
You can also get the achievement "This. Is. THOBEN!" if you wait for the guard to walk to the ledge in front of them.
If you are going for that achievement too, jump off the cliff after you push them.
Rinse and repeat 9 more times