Here is the full list of all 16 Dungeon Core achievements.
Complete the tutorial
Kill 100 enemies
Kill 250 enemies
Kill 1,000 enemies
Collect 250 in total
Collect 1,000 tech in total
Collect 2,500 tech in total
Kill that squid
Destroy the big bot boss
Finish off that snake
Complete the game
Destroy 10 terminals
Fully upgrade the shop
Salvage a weapon
Max out a weapon
Unlock a permanent upgrade