Here is the full list of all 30 Judge Dredd: Countdown Sector 106 achievements.
Use ricochet rounds
Get to know all of Sector House 106
Find all the Vitality bonuses
Find the ultimate ending in any mode
Find all the mysterious VoD devices
Find all the blueprints
Arrest a perp for breaking health regs
Accidently knock down a group of old folks
Kill two unusual creatures
Be responsible for the destruction of a pot-plant
Use your Bootknife
Take down a cannibal with a large appetite
Kill three perps in one move
Roll two ones in a single roll
Use explosive rounds
Use armour piercing rounds
Ride a powerboard
Achieve a Lawgiver Skill of 10 or above
Find the ultimate ending in Hardcore mode
Find all the illustrations
Visit all active locations in Sector 106
Kill or arrest all perps connected to data from the briefing room
Roll two sixes in a single roll
Enter Harridges from the front and back
Abseil down a building and through a window
Take down a gambling den
Arrest 5000 perps in one go
Take down a Robot
Find all the perp records and data
Successfully pull off a Lawmaster Kick