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