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