Full list of all 12 Lost Artifacts: Time Machine achievements worth 1,000 gamerscore.
All achievements
Achievements they've won
Achievements they've not won
For speeding up workers
For fixing the portal
For catching the kraken
For getting rid of the Bandit
For restoring time altars
For completing all levels with 3 stars
For activating the portal
For stopping time
For speeding up construction
For catching 30 mammoths
For catching 30 skeletons
For defeating the Villain