Here is the full list of all 26 Delver achievements.
Trip 10 traps in one run.
Find 5 secret areas in one run.
Max out on backpack slots.
Buy a magical elixer from Joff.
Take 400 damage in one run.
Chow down on 40 things in one run.
Zap wands 300 times in one run.
Listened to the wise.
Use 10 scrolls in one run.
Max out on belt slots.
Escaped with the Orb.
Find 300 gold in one run.
Grab the orb.
Make it through the Ruins
Bought something from the wizard.
Make it through the Sewers
Use 15 potions in one run.
Kill 150 monsters in one run.
Identify 5 items in a run.
Make it through the Caves
Become poisoned 10 times in a run.
Buy a belt slot.
Buy a backpack slot.
Make it through the Dungeons
Died, for the first time.
Bought something from Joff.