This list includes all the quests. It seems the quest The Magic of Childhood is NOT needed. My theory is that one of the new quests replaced that quest and some number is required to meet this achievements' conditions.
The quest list is:
*A role playing game (story quest)
*Denial, anger, innitiative (story quest)
*Post-Crumpocalyptic (you can find all crumpets for every location but this will not finish before getting to the lair of infinite agony!)
*Elli in shining armor
*Roll insight
*Fake Geek Guy
*MMORPGFPS
*Critical fail (Arguk the Butcher will become a farmable boss after this quest)
*Tree hugger (whenever you plant the stalk and you play Salvador and want to gunzerk 90 seconds or more? This is the spot. The map is constantly crowded by orcs, stumpies and treants, especially since there is a small chance Mosstache will not move at one point but orcs keep pouring in! Reloading the game will solve this bug)
*Lost souls
*The Bane (NEW quest)
*The Beard makes the man
-My kingdom for a wand
-Claptrap's Apprentice
(Both become available after Beard makes the man is turned in. I recommend you finish this on normal mode. The Grog Nozzle is an incredible and somewhat powerful slag/healing weapon with a very very high chance of slagging. With grenades like the Magic Missile or Chain Lightning you have pretty much full healing half the time when wielding the Grogg Nozzle! But after this quest is turned in you lose it for that playthrough! Also. Every time you load the game this weapon changes parts. Also. Pressing
) over and over while holding the Grog Nozzle quickly triggers the drunk effect faster. What it does? Whenever you hold the Grog Nozzle and get drunk, switching to another weapon doubles the ammo coming out of that weapon at no additional cost of ammo!)
*The sword in the stoner
*Dwarven alies (Story quest)
*A Game of games (Story quest)
*Winter is a bloody business
*Loot ninja
*My dead brother
*Shoot this guy in the face (NEW quest!)
*The amulet
*Pet Butt Stallion (available after A Game of Games is complete)
*Feed Butt Stallion
*Find Murderlin's temple (available after A Game of Games is complete)
*Magic Slaughter: Round 1
*Magic Slaughter: Round 2
*Magic Slaughter: Round 3
*Magic Slaughter: Round 4
*Magic Slaughter: Round 5
*Magic Slaughter: Badass Round (Can be repeated over and over. Warlord Slog can still drop the Ogre like he did in the original DLC!)
*The magic of childhood (NOT needed!)
*Raiders of the Last Boss (available after Fake Geek Guy and A Game of Games is complete)
Good luck!