Here is the full list of all 51 Steamburg achievements.
You have used the extra bomb
You have got all the achievements
You have used the unclouder
You have used all the teleporters
You have crossed all the bridges
You have saved Elizabeth
You have collacted all the green orbs
You have collected all the green orbs in Eastside
You have examined all the objects
You have entered all the shelters
You have found extra bombs
You have watched the complete intro
You have found the unclouder
You have fixed the pipes
You have destroyed a Radar-bot
You have destroyed a robot with a Radar-bot
You have found the map
You have evaded the flying saucer
You have collected all the green orbs in the South district
You have unlocked Eastside
You have learned the story of Elizabeth and Vincent
You have read Elizabeth's diary
You have set the mirrors
You have discovered Vincent's past
You have opened the safe
You have found the torch
You have entered all the bunkers
You have completed 9 levels in a single session
You have destroyed an Aviator
You have teleported 18 robots
You have found Elizabeth's bag
You have visited all Vincent's places
You have unlocked the South District
You have phoned Elizabeth
You have collected all the green orbs in Westside
You have destroyed 99 robots
You have scanned the blueprints
You have destroyed a Chaser
You have listened to the complete broadcast
You have fine-tuned the radio
You have destroyed 33 robots
You have turned on 33 generators
You have thrown 99 bombs
You have unlocked Westside
You have made a phone call
You have collected the bag
You have collected all the green orbs in the North district
You have fine-tuned the telescope
You have destroyed 9 robots
You have destroyed a robot with a bomb thrown through a teleporter
You have destroyed a Walker