Here is the full list of all 22 Treasure Hunter Simulator achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Sell your first item.
Find 5 items.
Find your first legendary item.
Find your first rare item.
Find your first item.
Find 5 legendary items.
Sell 5 items.
Find 5 rare items.
Find 10 common items.
Find 20 common items.
Travel the world.
Buy your first metal detector.
Buy your first digital detector.
Find 10 legendary items.
Sell 10 items.
Reach the top prestige level.
Finish 5 time trials.
Take 20 photos with your PDA.
Finish 10 jobs
Finish your first job
Have a total of 1000$.
Finish the story mode.