Here is the full list of all 76 Mining Mechs achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Reach mech level 3
Complete the Tutorial
Sell for a total value of $1337
Collect 100 jewelry
Dig 5.000 blocks
Collect 100 trash
Unlock the scorpion mech
Unlock the crane mech
Have $1.000.000
Make a deal with the devil
Collect 100 tin
Collect 100 copper
Collect 100 azurite
Collect 100 gold
Collect 30 sapphire
Collect 20 emerald
Collect 100 amethyst
Bounce on top of the airship
Unlock the kangaroo mech
Reach a depth of 1000m
Find a Hellstone
Collect 100 diamond
Pass the airlock
Reach a depth of 900m
Collect 100 uranium
Find out how high you can fly
Reach a depth of 800m
Unlock the rhino mech
Collect diamond ore
Pass the plated stone barrier
Reach a depth of 700m
Collect 10 treasures
Collect 10 ruby
Reach a depth of 600m
Collect uranium ore
Dig 2.000 blocks
Reach a passive income of $100
Pass the outpost gate
Reach a depth of 500m
Collect amethyst ore
Deliver 1000 dirt
Collect 100 realgar
Reach a depth of 400m
Collect gold ore
Unlock the turtle mech
Have $100k cash
Collect 100 cobalt
Reach a depth of 300m
Collect azurite ore
Dig 1000 blocks
Collect a ruby gem
Unlock the beetle mech
Collect an emerald gem
Reach a depth of 200m
Collect realgar ore
Get a mech to max level
Sell $10k worth of ore at once
Collect 100 silver
Use a teleporter
Find a treasure chest
Use a booster
Unlock the worm mech
Unlock the snake mech
Collect jewelry
Use confetti
Collect a sapphire gem
Find cheese
Collect trash
Collect tin ore
Use an explosive
Collect cobalt ore
Collect silver ore
Collect copper ore
Reach a depth of 100m
Connect your first mine