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