Here is the full list of all 70 Miner Meltdown achievements.
Win 20 games
Kill 75 gut busters
Kill 75 melee mutants
Kill 75 cuddlers
Kill The Dev
Heal 4000 health on teammates
Heal 2000 health on teammates
Kill 30 gut busters
Heal 500 health on teammates
Win 5 games
Kill 30 cuddlers
Kill 30 melee mutants
Kill 15 gut busters
Drop off 100 diamonds
Kill 30 players with the proximate mine
Drop off 50 diamonds
Win 1 game
Kill 1 player with the destructo-duck
Kill 5 players with the destructo-duck
Kill 15 players with the destructo-duck
Kill 5 players with the cluster grenade
Kill 15 players with the cluster grenade
Kill 30 players with the cluster grenade
Kill 15 melee mutants
Kill 15 cuddlers
Drop off 25 diamonds
Kill 5 players with the proximate mine
Kill 15 players with the proximate mine
Kill 5 players with the grenade
Kill 15 players with the grenade
Kill 30 players with the grenade
Kill 5 players with the molotov
Kill 15 players with the molotov
Kill 30 players with the molotov
Kill 30 players with the rocket launcher
Kill 30 players with the flame thrower
Kill 5 players with the lightning gun
Kill 15 players with the lightning gun
Kill 30 players with the lightning gun
Collect 3000 gold
Kill 30 players with the assault rifle
Kill 5 players with the blaster
Kill 15 players with the blaster
Kill 30 players with the blaster
Kill 15 players with the rocket launcher
Kill 5 players with the flame thrower
Kill 15 players with the flame thrower
Kill 5 players with the assault rifle
Kill 15 players with the assault rifle
Kill 30 players with the pistol
Kill 5 players with the shotgun
Kill 15 players with the shotgun
Kill 30 players with the shotgun
Kill 5 players with the rocket launcher
Collect 1500 gold
Kill 1 player with dynamite
Kill 5 players with dynamite
Kill 15 players with dynamite
Kill 5 players with the pistol
Kill 15 players with the pistol
Kill 30 players with the sword
Kill 30 enemy miners
Kill 75 enemy miners
Kill 1 player with the drill
Kill 5 players with the drill
Kill 10 players with the drill
Kill 15 players with the sword
Kill 15 enemy miners
Collect 500 gold
Kill 5 players with the sword