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