I will start the needed list:
Act1 (Assassin)
Blood Moor and Den of Evil (Q1) cleared -> just reached level 7
Cold Plains and Stony Field (Q2) cleared -> just reached level 10
Dark Wood and Graveyard Dungeons -> around level 12 1/3
Black Marsh and the Tower of the Countess (Q4) -> around level 14 1/2
Tamoe Highland, Outer Cloister, Barracks (Q5) and Jail -> just reached level 18
Cathedral -> around level 19 1/2
Catacombs (Q6) [without Butcher and King Leoric] -> around level 22 1/3
Act2
Sewers and all areas outside town cleared (Q1 and 3) -> around level 25 1/2
Palace and Arcane Sanctuary (Q4 and Q5) -> around level 26 1/2
Canyon and all 7 Tombs (Q3 and Q6) -> around level 27 4/5
Act3
Spider Forest, Great Marsh, Flayer Jungle, Lower Kurast and Kurast Basar (Q1, Q2 and Q4) -> around level 30 2/3
Upper Kurast, Sewers, Travincal and Mephistos Lair (Q3, Q5 and Q6) -> around level 32 1/3
Act4
Complete cleared (all Quests) -> around level 35 2/3
Act5
Bloody Foothills, Frigid Highlands, Arreat Plateau, Crystaline Passage and Frost River (Q1, Q2 and Q3) -> around level 38 4/5
The rest of act5 (without DC holes and without dungeon (Q4, Q5 and Q6) -> around level 44 3/4
No Cow Level made!
Act6
Dungeon down to level 16 -> Nasty without clearing all areas on the way complete (not enought time today) -> level 50 1/2
But all Bosses in the last Nasty killed (Andariel, Duriel, Mephisto, Diablo and Damien)!
to be continued...