Here is the full list of all 13 Lazy Galaxy achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Conquered One Galaxy
Click on each different building once (last 11 clicks should land on 11 different buildings)
Have 11 different buildings, each upgraded to level 11
Conquer 5 star systems
Have one of powerplant, Fuel Factory, ore refinery and none of automatic mine, solar panel, fuel platform
Destroy 100 bosses
Complete all Trader researches
Gain 100 Candy
Launch 6 different ships into space (at the same time)
Stay Offline for 3 Days
Complete all Scavenger researches
Complete all Scientist researches
Crush 1000 meteors. Savage!